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'Memories' is plural and therefore the singular 'that' cannot refer to the plural memories in the context.
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Arguments against using children as courtroom witnesses are often predicated on the unproved assumption that children’s memories are more malleable and less trustworthy than adults.

(A) adults
(B) that of an adult
(C) an adult is
(D) those of adults
(E) adults are

OFFICIAL EXPLANATION



The error in this sentence is popularly known as ‘comparing apples with oranges’. The author of the sentence obviously seeks to compare the memories of children with the memories of adults. But his sentence erroneously compares children’s memories with the adults themselves.

‘To correct this error, the underlined word “ adults” must be replaced by “ adults’ memories”, or “ memories of adults”, or “ those of adults”. Among the choices, (D) contains the last alternative, and is the answer.

(C) and (E) have the same error, and are wrong.

Choice (B) is wrong because it would result in comparing the brain of a single adult with the brains of all children.
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