【单选题】In 1988, Mr. Smith's annual income was greater than Mrs. smith's annual income. In 1989, Mr. Smith's annual income decreased by p percent, where as Mrs. Smiths annual income increased by p percent (p>...
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