Question $12$

An ongoing defined benefit plan's future commitments are difficult to estimate for the following reasons except:

Select one

A$.$ An unknown percentage of current employees do not work long enough to become "vested" in the plan.

B$.$ An unknown percentage of past employees have not worked long enough to become "vested" in the plan.

C$.$ An unknown percentage of future employees will not work long enough to become "vested" in the plan.

D$.$ An unknown percentage of "vested" employees will retire early.