Fill in the blank with the most suitable option:
A verb is used to express an occurrence, action, or state. It is the grammatical center of the predicate in a sentence.
An auxiliary verb is a verb which is used in the formation of tenses, moods, tones, etc.
Option C is correct as the sentence talks about something in general. Therefore, it must use the simple present tense.
The other options are wrong as no other tense can be used here.
The correct answer is C)daren't