Answer:
a. ​Places greater emphasis on the subject's concerns.
Explanation:
A difference between active and passive voice is that in the active voice the subject performs the action on the object and in the passive voice the object becomes the new subject of the sentence.
For example:
Mary wrote a letter. (Active voice)
Subject + verb + object
A letter was written by Mary. (Passive voice)
New subject + verb + by phrase
