What leadership style involves the ideas and advice of others?

According to John Gardner, in On Leadership, "Leadership is the process of persuasion or example by which an individual (or leadership team) induces a group to pursue objectives held by the leader or shared by the leader and his or her followers." If we accept that definition, then leadership style is the way in which that process is carried out.

Leaders' styles encompass how they relate to others within and outside the organization, how they view themselves and their position, and - to a very large extent - whether or not they are successful as leaders. If a task needs to be accomplished, how does a particular leader set out to get it done? If an emergency arises, how does a leader handle it? If the organization needs the support of the community, how does a leader go about mobilizing it? All of these depend on leadership style.

b.. i believe would be the right one sorry if im wrong.