Why did the Ming dynasty reduce contact with the outside world? A. Chinese silk and porcelain were no longer in high demand.
B. Their history with the Mongols made them wary of foreigners.
O
C. They wished to avoid exposure to the plague in Europe.
D. They viewed foreigners as a threat to Chinese culture.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

answer; they both highlight the power of the situation in determining behavior;