Lawrence believes there can be synergistic effects between intrinsic and extrinsic motivation. He gives his employees 25% of their work time to work on projects they are passionate about, even if it is unrelated to scope of their job or the mission of the company. Lawrence is using which of the following motivational mechanisms?
a. social learning theory
b. self-determination theory
c. extrinsics in service of intrinsics
d. intrinsics in service of extrinsics