Mark Funds Small Businesses That He Believes Have the Potential

Mark funds small businesses that he believes have the potential to grow large. When these companies are still in their initial stages and need investment, he buys their stocks at a low price and later sells them at higher prices when they are successful. Thus, Mark is a(n)

A) intrapreneur.
B) trade creditor.
C) franchisee.
D) venture capitalist.
E) loan shark.