Leadership is the
process of
Others to accomplish.
a. mission

The correct/valid answer  is A. mission.

More info:

Leadership is basically the process of influencing people by giving them a purpose, direction, and motivating them to accomplish the mission and better the organization.

a.   it resulted in widespread unemployment.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.