19.

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

Here is a parallel structure of three nouns: N1, N2 and N3, so the underlined part is modified by the noun magnificence and the adjective cool, and B is correct.

Item A: coolly is an adverb and cannot modify nouns, wrong.

Item C: cool is an adjective, and the noun form is used here, which is wrong.

Item D: Magnificent is an adjective, wrong.