Which of the Following Is True , Other Things Equal

Which of the following is true , other things equal?

A) A reduction in prices will increase the real wealth of those holding a fixed quantity of money.
B) A reduction in prices will lead to a decline in net exports.
C) A reduction in prices will increase the scarcity of money, raise the real interest rate, and, thereby, encourage investment and consumption.
D) A reduction in prices will increase profit margins and, thereby, stimulate additional investment.