The Davis-Bacon Act required that ________

a. employers meet with accredited representatives of a majority of their employees and to make an honest effort to reach agreement on issues raised
b. employers with federal contracts pay time and a half to any employee working more than eight hours per day
c. employers certify unions to represent a group of employees for purposes of collective bargaining if a majority of the employees sign authorization cards
d. companies using federal dollars for construction projects use the "prevailing wage rate" of the area as the minimum-wage rate on their construction projects

d