The answer is indeed letter B) He don't have enough time to do it.
Explanation:
Nonstandard English is a term that refers to the improper use of the English language, especially concerning grammar. It means that a sentence is perfectly capable of conveying meaning but, grammatically speaking, it is considered incorrect. That is what happens to the sentence on the second option, "He don't have enough time to do it." Even though it is understandable, the use of the auxiliary verb is nonstandard.
As we know, the auxiliary verb "do" conjugates by having -es added to its ending when referring to a third-person-singular subject. "He" is a third-person-singular subject, so the grammatically correct sentence should be "He doesn't have enough time to do it."
