问题详情

Why did Cheng Ho go on his first voyage in 1405？
A．He wanted to be the first to sail round the world.
B．He had to collect gifts and tributes for his emperor.
C．He was ordered to hunt the deposed former emperor.
D．He wanted to include the places he would cover into the Chinese territory.请帮忙给出正确答案和分析，谢谢！