This is true. Jefferson was the 3rd president
D. Encouraged fair trade for all countries.
According to the Open Door policy, China’s ability to tax trade encouraged fair trade for all countries.
Open door policy referred to the policy of China to open up foreign business in order to bring about economic transformation of modern China.
This happened after Deng Xiaoping took office in 1978,
Is this a multiple choice question?
I would say all of above but that is my opinion