GMAT888 wrote:
Agree it's B. Since the dull companion helps readers solve the mystery, we can conclude that readers do so by spotting the mistakes of the dull companion.
It cannot be B because you cannot justify that from the passage; the passage states that '...the author's strategy of including the dull companion gives readers a chance to solve the mystery.." It doesn't say that most readers actually solve the mystery. Being given the chance to attend business school is not the same as actually attending
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