You are in the process of estimating the number of work periods that will be needed to complete individual schedule activities. ?

All of the following are tools/ techniques you can use EXCEPT: A. Estimating duration by multiplying the quantity of work to be performed by productivity rate B. Estimating duration by calculating the average of three duration estimates (most likely, optimistic, pessimistic) C. Estimating duration by calculating multiple project durations with varying sets of activity assumptions using Monte Carlo analysis D. Estimating duration by using contingency reserves E. Estimating duration from a previous, similar schedule activity based on historical information and expert judgment