Why do countries engage in specialization and trade? A To earn the highest possible profits on the global market

B Many countries have limited resources so they have to limit what
they make

C To align with the educational levels of a country's work force

D To obtain the goods and services they need in the most efficient
way.

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation:

the answer is definitley b!

c. the passage of the fifteenth amendment