Here are the correct responses to your questions:
Question 1: How did the Portuguese convince southern Indian princes to ally with them?
Response: They promised to aid the princes against other European powers.
Question 2: What was the name of the group formed by wealthy Dutch merchants in 1602?
Response: The Dutch East India Company.
Question 3: What two main European powers fought for control of trade in India as the Mughal Empire declined?
Response: France and England.
Question 4: What was the significance of the Canton trading post?
Response: It was the only trading post in China where foreigners were allowed to trade.
Question 5: What does it mean when a country has a policy of isolation?
Response: A country has a national policy of not getting involved politically or economically with other countries.