Which of the Following Best Defines the Term 'Coalition

Which of the following best defines the term 'coalition'?

A) A systematic efforts, performed at any place in the social field, to move others in pursuit of some design cherished by the mover
B) Small or large groups of people who come together to survive and to live well
C) A specialized activity of those individuals and institutions that make and enforce public decisions that are binding upon the whole community
D) The joining of forces of two or more parties during a conflict of interest with other parties