Which of the following is likely to lead to a fall in the price of good Q which of a normal good?(
选项：

A:A rise in the price of good P, a substitute for good Q;
B:A fall in the level of household incomes generally;
C:A fall in the price of good T, a complement to good Q;
D:Belief that the price of good Q is likely to double in the next 3 months