The Wages of Office Cleaners in the United States Are

The wages of office cleaners in the United States are ________ than the wages of office cleaners in India because ________.

A) lower; few Americans want jobs as office cleaners generating a lower supply of office cleaners in the United States
B) lower; Indians work more hours
C) greater; American offices are more productive, hence more valuable to keep clean
D) greater; more Indian cleaners are in a union