Question

complete the sentence with the best subject. before the parade begins, ______ flashes. the light on top of the lead car the lights strung across the street

Explanation:

To determine the correct subject, we analyze subject - verb agreement. The verb "flashes" is in the singular form (third - person singular present tense). We need a singular subject. "The light on top of the lead car" is a singular subject (referring to one light), while "the lights strung across the street" is a plural subject (referring to multiple lights). So, the subject that agrees with the verb "flashes" is "the light on top of the lead car".

Answer:

the light on top of the lead car