Tonya and Kurt ______ in the store.

• A. working
• B. is working
• C. are working
• D. workers

Answer: (C)

The phrase "Tonya and Kurt" refers to two individuals, and when using a verb that describes an action performed by both, the verb must agree with the plural subject. The correct choice "are working" properly aligns with the plural subject. In English grammar, the verb "to be" changes form depending on the subject; "is" is used for singular subjects while "are" is used for plural subjects. Since there are two people involved, "are" is the appropriate form to indicate that both Tonya and Kurt are currently engaged in the action of working in the store.

The other options do not match this requirement. For instance, "working" lacks a helping verb and doesn’t complete the sentence grammatically. "Is working" incorrectly uses the singular verb form, which does not fit the plural subject. "Workers" changes the structure of the sentence entirely and does not indicate the action being performed in the present continuous tense. Therefore, "are working" is the only choice that correctly conveys that both individuals are actively working in the store.