C.

com‧mit‧ment
–noun
1. the act of committing.
2. the state of being committed.
3. the act of committing, pledging, or engaging oneself.
4. a pledge or promise; obligation: We have made a commitment to pay our bills on time.
5. engagement; involvement: They have a sincere commitment to religion.

This is one of the Cs that no one, not even yourself, can see.
So who will know if anyone has it?

But somehow, many things in life revolve around commitment.