Question

what form of gustar do you use with singular nouns? son gustan gustar gusta

Explanation:

In Spanish, the verb "gustar" is used to express liking. When the noun is singular (e.g., "el libro"), we use the third - person singular form of "gustar", which is "gusta". "Son" is the third - person plural of "ser" (to be) and is not related to "gustar". "Gustan" is the third - person plural form of "gustar", used with plural nouns. "Gustar" is the infinitive form and not used to agree with singular nouns in this context.

Answer:

D. gusta (assuming the options are labeled A: son, B: gustan, C: gustar, D: gusta)