C is the answer I think♀️
The US wanted it for its great Port cities. Plus they wanted to gain California from Mexico so the British wouldn't claim it.
I believe the answer is behavioral perspective
Behavioral perspective focus on how we can make individuals behave a certain way by by conditioning a certain stimulus-response relationships.
To achieve this, most of them would utilize reward or punishment to make the individuals lean toward a certain behavior.<span />
There could be lots of meanings to the word money. It could be the literal definition like paper or coin currency. Or it could also be a way of showing power.