Answer - C - Intrinsic motivation is motivation that comes from within your own thinking or desire. And intrinsic motivation, is of course, the opposite of extrinsic motivation, which comes from sources outside your own thought process.
Intrinsic motivation refers to the drive to engage in an activity for its own sake, as opposed to being motivated by external factors such as rewards or punishments. It is driven by personal interest, enjoyment, or a sense of satisfaction from the task itself. Intrinsic motivation is often considered to be more powerful and longer-lasting than extrinsic motivation.