In the United States, in Approximately the Last 2-3 Decades

In the United States, in approximately the last 2-3 decades, the supply of highly-skilled (HS) labor relative to less-highly-skilled (LS) labor has been rising. At the same time,The ratio of wages of HS labor relative to LS labor has been __________, and, therefore,The demand for HS labor relative to LS labor must have been increasing __________ than The supply of HS labor relative to LS labor.

A) falling; less rapidly
B) falling; more rapidly
C) rising; less rapidly
D) rising; more rapidly