Practice GMAT Sentence Correction Question

There are two main problems with the original sentence.

(1) The original sentence contains an improper idiom. The idiom as many x than is not idiomatically correct and should be replaced by the idiomatically correct phrase as many x as.

(2) would be killed in World War I is illogical as it is in the future tense, implying that World War I occurred after World War II. The phrase could be made significantly more concise using as many lives as World War I. The words would be killed in or were killed in are not necessary and should be omitted.

1. The idiom as many ... than is incorrect; the use of the future tense causes the sentence to illogically imply that World War I occurred after World War II
2. The use of the future tense causes the sentence to illogically imply that World War I occurred after World War II
3. The idiom as many ... than is incorrect; those who were killed in is awkward and unnecessary
4. The idiom as many ... than is incorrect
5. The correct idiom is used (as many ... as); the sentence correctly implies that World War II occurred after World War I; the unnecessary phrase were killed in is omitted