Answer:
A. Brandon and Jake haven't been told the news yet.
Step-by-step explanation:
The passive voice is used to put emphasis on who or what receives or experience an action instead of the one who performs the action, and it is made up of the appropriate form of the verb "to be" + the past participle of the main verb.
Sentence A exhibits those characteristics: It puts the focus on the people who have not received the news: Brandon and Jake, instead of the people who told the news; and it uses the appropriate form of the verb "to be", which it's "been" (because the sentence is in Present Perfect), plus the past participle of the verb "tell", which it's "told."