Sentence Correction (SC) | The Atlantic Ocean, the second youngest of Earth's five oceans

MAGOOSH Official Explanation:

Split #1: verb parallelism. All five answers begin the underlined phrase with some form of verb, then have the word "and" (after "Africa"), and we need another bonafide verb. Choices (A) & (C) & (E) have an actual verb, but choices (B) & (D) have only the participle "expanding" --- a full verb cannot be parallel to just a participle, so these two are wrong.

Split #2: verb tenses. First of all, verbs of different tenses can
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