Correct Answer: (a) disperse
Note: Disperse- to hate somebody/something very much.
Muster- to come together, or bring people, especially soldiers, together, for example for military action.
Convene- to come together or to bring people together for a meeting, etc.
Mobilize - to organize people or things to do something.
Assemble- to come together or bring somebody/something together in a group.