A) The girls from my neighborhood walk to the bus each morning.
Explanation:
When subjects and verbs agree, this means that both will be of the same number. Thus, if the subject is singular, the verb will be singular. If the subject is plural, the verb will be plural. When the subject is singular and the verb is plural or vice versa, they are said to not agree. Thus, you will have a subject-verb agreement error. As such, because “girls” is plural, in order for the verb to agree, it should be plural—“walk.”