Answer:
D. Physics sometimes confuses me.
Step-by-step explanation:
Subject-verb agreement refers to the relationship which is built with a subject and a verb. They share an agreement among each other to make a sentence grammatically correct. If the subject represents a singular number, so does the verb. In case when the subject is plural, the verb too will be in a plural number. Sentence D is the sentence in which the subject and the verb agree in number.