Why Are People Less Willing to Make a Large Investment

Why are people less willing to make a large investment than a small investment when both investments carry the same probabilities of success versus failure as well as the same rates of return?

A) The risk level is positively related to the number of investors.
B) If a large investment is broken into smaller parts, the return rates grow.
C) The potential positive impact on wealth and utility is much greater with a large investment.
D) The potential negative impact on wealth and utility is much greater with a large investment.