When Using the Beta Probability Distribution to Estimate Activity Times,which

When using the beta probability distribution to estimate activity times,which of the following statements is TRUE?

A) The project manager is usually the only person involved in making time estimates, since obtaining estimates from workers involved in the activities would result in inconsistent estimates.
B) The beta distribution is used as a way of approximating a normal probability distribution for time estimates.
C) The use of most optimistic, most likely, and most pessimistic times for an activity will result in a determination of the expected times for that activity.
D) The larger the difference between most pessimistic time and most optimistic time for an activity, the smaller the variance of that time estimate.