Final answer:
People understand sentences in the active voice best because they are clearer and more direct,(option a) with the subject performing the action of the verb. Active voice creates stronger and more engaging sentences compared to the passive voice, which can be wordier and less dynamic.
Step-by-step explanation:
People are able to process the meaning of a sentence best if it is an affirmatively worded sentence in the active voice. When a sentence is written in an active voice, the subject performs the action of the verb, creating a stronger, clearer, and more direct statement. The active voice promotes engagement with the subject that is doing the action, making the sentence easier to understand and the narrative more compelling.
Conversely, in passive voice, the subject receives the action and the object of the action may become the focal point. Although the passive voice is not inherently incorrect and may be preferred in situations where the doer of the action is unknown or the object of the action is more important, passive-voice sentences tend to be more wordy and can lack vitality. Thus, active-voice sentences tend to be more effective for clear communication.