A. To convince colonists to join the cause
The correct answer is letter C.
The preemptive right is a special clause specific to sales contracts that stipulate the right of the seller to read the welfare requirement or the case of the desired supplier. Basically, it is the right of someone to be preferred on terms and conditions with the third party in the acquisition of something.
I feel like it's A because Japan and the U.S don't really have such a bad connection anymore. If they did, they would still be in war.