Answer:
B. The school principal will explain the new fundraiser for the sports program during the meeting this evening.
Step-by-step explanation:
An active voice is when the subject of the sentence is the performer of the verb in the sentence. On the contrary, a passive voice will have the subject be acted on by the verb. The simplest way to identify active and passive voice is the use of "by" before the subject in the sentence, for this signifies it is a passive voice.
Among the given options, the sentence that is in the active voice is the second sentence. In this sentence, the subject "the school principal" does the verb's action "explain". Thus, the correct answer is sentence B.