In 1988, Mr. Smith's annual income was greater than Mrs. smith's annual income. In 1989, M

r. Smith's annual income decreased by p percent, where as Mrs. Smiths annual income increased by p percent (p＞0)

Column A Column B

Mr. and Mrs. Smith's combined Mr. and Mrs. Smith's combined

annual income in 1988 annual income in 1989

A．if the quantity in Column A is greater

B．if the quantity in Column B is greater

C．if the two quantity are equal

D．if the relationship cannot be determined from the information given