Final answer:
The sentence 'c Rebecca and Lauren went to the beach.' is in the active voice because the subjects perform the action of the verb. Active voice results in clearer and more direct sentences, whereas passive voice occurs when the subject receives the action.
Step-by-step explanation:
The sentence written in active voice among the given options is 'c Rebecca and Lauren went to the beach.' In this sentence, the subjects (Rebecca and Lauren) are performing the action (went). Active-voice sentences have the subject doing the action described by the verb, leading to clearer and more direct sentences. To identify an active voice, you look for a sentence where the action is performed by the subject. For example, 'I devoured the silky pudding' and 'The two presidents are signing the agreement' are both in active voice.