Which of the Following Is an Example of Aggression

Which of the following is an example of aggression?

A) Sam accidentally slams her car's door hard and it hits Tim's knee.
B) Luisa urges her classmates not to vote for Marcy for the post of dormitory senator and cites some rumors about Marcy's social life.
C) Carla,a dentist,gives a shot of Novocain before pulling out her patient's affected tooth.
D) Joe's eagerness and enthusiasm results in his being promoted as a sales manager in a very short time.