The Fair Labor Standards Act $($FLSA$)$ is the federal law that governs the payment of wages, including minimum wage and overtime compensation. What is the rule regarding the payment of overtime compensation under the FLSA?

a$.$ The FLSA requires an employee to be paid overtime pay $"$at a rate not less than $$10\mathrm{.}87$ per hour."

b$.$ The FLSA has no rule regarding the payment of overtime wages, but the industry standard is time$-$and$-$a$-$half.

c$.$ The FLSA requires an employee to be paid overtime pay $"$at a rate not less than one and one$-$half times the regular rate at which he is employed."

d$.$ The FLSA requires an employee to be paid overtime pay $"$at a rate not less than one and one$-$half times the federal minimum wage."