When Using the Beta Distribution for Estimating Activity Times

When using the beta distribution for estimating activity times,

A) the most likely time estimate can be positioned anywhere between the optimistic and pessimistic time estimates.
B) the most likely time estimate becomes the mean of the distribution.
C) we assume that the standard deviation is one- third the range between the optimistic and pessimistic time estimates.
D) an advantage is that the mode of the distribution is always equidistant from the end points of the distribution.