I believe that's A. compound sentence. Compound sentences are sentences with an independent clause such as "and, or, but" and while it does contain a compound verb, it's not a simple sentence
C is the correct answer .
Answer: C. have been waiting patiently for winter since the spring.
Explanation: A verbal phrase is the part of a sentence that contains the verb and any direct or indirect objects, but it doesn't include the subject (the person, animal or group that perform the action of the verb). In the given sentence, the subject is "I" and the verbal phrase is " have been waiting patiently for winter since the spring", where the verb is "have been waiting" and the rest of the phrase are the modifiers.
I'm not 100% sure of the answer, but it would probably be that they use personal opinion rather than fact to back up their arguments.