This is a test of commonsense with single/multi-choices. Complete the next sentence:

Kids are in a gym working out on the floor. A boy is kicking a mat being held by a man. a boy

Available options: A). is entering the gym holding a gun.; B). is moving back and forth and then the man picks him up and throws him on a table.; C). is throwing a ball into the air.; D). is wearing boxing gloves practicing boxing.;
The answer is:
D).