The correct answer is "C) Coalition".
A coalition is an alliance among individuals in which they cooperate between each other in order to pursue a common goal. However, every member of the coalition acts on their own self-interest. This partnership is normally of a temporary nature.
In this case, Todd got support from 2 other key members of the organization, forming an organization. The goal was to convince the CEO to contract Todd's candidate of preference as a supplier. Each of them probably had their own, different interests regarding the accomplishment of this.