23.
Your Answer is
Correct Answer is A
Explanation
Here are three parallel groups of words the seasons, the sun, the acidity and moisture. Because there is no article the before moisture, acidity and moisture should be regarded as a whole.
Item A: Parallel A, B, and C that satisfy the parallel structure of three groups of words
Item B: Not only...but also...only two groups of nouns can be juxtaposed.
Item C: either...or...fixed collocation, only two groups of nouns can be juxtaposed.
Item D: both...and...only two groups of nouns can be juxtaposed.