I believe the answer is C but confirm online! Hope this helped :))
The correct answer is:
B. Relocation to suburbs.
Relocation to suburbs has been a constant of urban life since the early 1900s.

I wanna be helpful and I'm pretty sure it's A, but I also believe that people were paid to move
A result of President Carter's desire to ease tensions with China was increase trade. President Jimmy Carter started to ease tensions with China by recognizing the communist regime in January 1979, with that trade was increased, along with cultural, commercial “and other unofficial relations”.
1791 was the year the second amendment was made!