Answer:
Black code basically means laws that ensure white supremacy. So since this law is restricting freed men (former black slaves) from being able to have and leave jobs as they choose, it becomes black code/discrimination.
I'm not 100% sure but it could be: Voluntary Exchange takes place between buyers and sellers:
(btw I copied and pasted from the question so I didn't take any content :D)
Answer: B. a tax the British imposed on the colonies to help pay off their debt
Explanation:
the correct answer is (B) building missions.
The missions were built by the Spanish starting the year 1769 in order to "colonize" the territory of Alta California, which they had discovered over two centuries earlier. The mission system required that Indians brought into a mission by being baptized into the faith and through this they could become"civilized." This was considered a big plus for supporting the use missions as the central element in colonization.