GMAT Sentence Correction (SC) | Ants, by themselves, are weak creatures,

Ants , by themselves, are weak creatures, butwhen ants are considered along with others of their species, they are known for their highly organized and powerful colonies and nests, which sometimes consist of millions of individuals.

A. when ants are considered along with others of their species,

--> correct

B. whenconsidering them with others of their species, then

-->when +then --> redundant.considering seems to modifyants -->ants considering ants --> illogical.

C. ants,
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