SAT Sentence Completion Practice Question 313: Answer and Explanation

Next steps

Question: 313

4. A recent data recording a bottlenose whale's phenomenal dive of over 4700 feet ------ earlier ------ that such whales were among the sea's deepest divers.

A. Refuted… theories
B. Challenged… predictions
C. Confirmed… speculations
D. Validated… disclaimers
E. Substantiated… doubts

Correct Answer: C

Explanation:

Explanation for Correct Answer C :

Choice (C) is correct. "Confirm" means to prove to be true, and "speculations" are guesses. If one were to insert these terms into the text, the sentence would read "Recent data recording a bottlenose whale's phenomenal dive of over 4,700 feet confirmed earlier speculations that such whales were among the sea's deepest divers." The phrase "recent data" and the term "earlier" set up a relationship between a fact and a claim. Data proving the bottlenose whale's diving ability would indeed "confirm ealier speculations," or guesses, that these animals are "among the sea's deepest divers."

Explanation for Incorrect Answer A :

Choice (A) is incorrect. "Refute" means to prove false, and "theories" means systems of belief or conjectures. If one were to insert these terms into the text, the sentence would read "Recent data recording a bottlenose whale's phenomenal dive of over 4,700 feet refuted earlier theories that such whales were among the sea's deepest divers." A bottlenose whale's "phenomenal," or remarkable, dive would help to prove, not "refute," conjectures that the animals are superior divers.

Explanation for Incorrect Answer B :

Choice (B) is incorrect. "Challenge" means to call into question, and "predictions" means assertions about future outcomes. If one were to insert these terms into the text, the sentence would read "Recent data recording a bottlenose whale's phenomenal dive of over 4,700 feet challenged earlier predictions that such whales were among the sea's deepest divers." Such data would support, not "challenge," predictions that the bottlenose whale is a remarkable diver.

Explanation for Incorrect Answer D :

Choice (D) is incorrect. "Validate" means to support with evidence, and "disclaimers" means denials. If one were to insert these terms into the text, the sentence would read "Recent data recording a bottlenose whale's phenomenal dive of over 4,700 feet validated earlier disclaimers that such whales were among the sea's deepest divers." The bottlenose whale's "phenomenal" dive disproves, not "validates," earlier rejections of the notion that these animals are "among the sea's deepest divers."

Explanation for Incorrect Answer E :

Choice (E) is incorrect. "Substantiate" means to show to be true with evidence, and "doubts" means uncertainties. If one were to insert these terms into the text, the sentence would read "Recent data recording a bottlenose whale's phenomenal dive of over 4,700 feet substantiated earlier doubts that such whales were among the sea's deepest divers." A "phenomenal" dive of 4,700 feet would remove, not "substantiate," doubts that bottlenose whales are among the sea's deepest divers.

Previous       Next