Choice (A) does not use the correct English idiom for a comparison. When making a comparison of degree--more than or less than--we must use the word "than." (If we compare things and find them equal, we can convey that using the construction "as . . . as . . ."). We can therefore eliminate choice (A), as well as choices (B) and (E), on the same grounds.
Choice (C) uses the correct idiom to make a comparison, and it also gets rid of the unnecessary word "being." The phrase before the comma grammatically modifies the subject that comes after the comma, "the American Navy." The reference is clear and accurate.
Choice (D) uses the incorrect idiom "more large." Typically, if a word has two or fewer syllables, we use an "-r" (i.e., "larger") rather than "more." We can eliminate choice (D).
The correct answer is (C).