What will happen to a project's schedule if there are resource overloads and the critical path is delayed?

a. Nothing will happen to the project's schedule if the critical path is delayed.
b. The project's schedule will slip only if the float / slack period for the critical path activities is not enough to resolve the resource overload issue.
c. The project's schedule will slip only if the float/slack period for the noncritical activities is not enough to resolve the resource overload issue.
d. There is never a delay in the critical path, because it is the longest path through the network.

b. The project's schedule will slip only if the float / slack period for the critical path activities is not enough to resolve the resource overload issue.

Explanation:

This is true because, the resource overload will be an impediment to the critical activities going on in the project. There supposed to be an equilibrium between the resource and the project schedule in-order to ensure completion of the project within the given time frame.