The Ming Dynasty built large sailing vessels called junks to sail the Pacific and Indian Oceans. These ships were much larger than anything built by the Europeans. Why did Emperor Zhu Di build such large ships, and so many of them? Select one:
a. He wanted to show other nations that China was a very powerful and successful country.
b. Smaller ships might collapse at sea, and fewer ships were more open to attack.
c. The Chinese had unusual quantities of wood to use for building ships.
d. He planned to bring back thousands of slaves to work in the silk factories.

Option: a.He wanted to show other nations that China was a very powerful and successful country.

Explanation:

China in the 15th century and 16th century under the Ming Dynasty controlled over the Indian ocean. The reason behind it was the building of the large ships or vessels called junks for trading purposes.  During their reign, China became the largest economy in the world. Ming developed trade network that promotes the development of trade in China. Under admiral Zheng He, China got hold over the Indian Ocean. He went to several expeditions and opened trading connection with South Asia, India, Java, Sri Lanka, and Sumatra.

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!