what is the answer and why?

What is the difference between portfolio investment and foreign direct investment? O A. Foreign direct investment is the acquisition of stock in the company while portfolio investment is the loaning of money. O B. Portfolio investment is the acquisition of stock in the company while foreign direct investment is the loaning of money. O C. Portfolio investment is the purchase of less than 10 percent of the shares of ownership while foreign direct investment is the acquisition of more than 10 percent. O D. Foreign direct investment is the purchase of less than 10 percent of the shares of ownership while portfolio investment is the acquisition of more than 10 percent