... the phrase begun by undergoing. 1 GMAT SENTENCE CORRECTION SAMPLE QUESTIONS Instruction: This file contains 268 sample questions on GMAT Sentence Correction and explanations for 28 of ... broken apart; rather a kind of nuclear battery that uses natural radioactive decay to produce power. (A) apart; rather (B) apart, but rather (C) apart, but rather that of (D) apart, but ... in some parts even faster than, those (C) as fast, and in some parts even faster than, those (D) as fast as, and in some parts even faster than, those (E) as fast as, and in some parts even...