Which of the following statements is true according to the davis-bacon act of 1931 and the walsh-healy public contracts act of 1936? a. under these laws, individuals aged 18 and 19 may not be employed in hazardous occupations defined by the department of labor. b. federal contractors must pay their employees at rates at least equal to the prevailing wages in the area. c. the overtime rate applies to the hours worked beyond 45 in one week. d. employers must pay a training wage to workers under the age of 15 for a period of up to 60 days. e. organizations can defend themselves against claims of discrimination by showing