Which of the Following Was Not Listed in the Text

Which of the following was not listed in the text as a convention for estimating task progress?

A) 50% when task is started and another 50% when it is completed
B) 100 percent when task is completed and 0% before that
C) using the ratio of cost expended to total cost budgeted
D) using the ratio of time expended to the total time scheduled
E) all of the above were mentioned