Answer:
The main purpose of the sentence is Option B: to convey a human element and create empathy with the audience
Step-by-step explanation:
Robert Kennedy, brother of John Kennedy, broke the news of assassination of John Kennedy to the nation in a campaign rally.
He addressed all the citizens and asked the black people if they were having the same feeling of sorrow and grief on John's murder as he had. His main purpose was to create empathy with the audience. He was not trying to instill love in the citizens of U.S as per Option B. Nor he was explaining about the revenge, as option C. He was not educating the audience about violence in U.S.