The sentence that is written correctly is (A.) Wendy swims faster than any other girl on the team.
Sentence A is the right one because the comparative structure, which includes the comparative adjective "faster", has been used in a correct way. On the other hand, sentence B. has not been written correctly because the word "was" at the end should not have been included. Moreover, in sentence C., the use of the comparative adjective "longer" is incorrect and the word "other" after "any" is missing. Furthermore, "did" should be replaced by "else" in sentence D.
