### The CR Assumption Post-Mortem\n\nAssumption questions are the most common Verbal bottleneck. Candidates frequently confuse a statement that merely *strengthens* the argument (which often leads to option C) with one that is *necessary* for the argument's survival (option E).\n\n#### The Anatomy of the Trap\nIn many high-difficulty questions, GMAT designers construct option C to look like a perfect explanation. However, if negated, the argument remains structurally sound. True assumptions (option E) are logical necessities: if negated, the argument is instantly ruined.