You are entering tasks in a project you are tracking in Microsoft Office Project Standard 2007. You enter the duration of each task. Then you assign multiple resources to each task. As a result, the duration of the tasks changes. You want the duration of all future tasks to automatically remain the same when you assign resources to those tasks. What should you do?

A.
Enable the manual calculation mode.

B.
Change the duration of all existing tasks.

C.
Change all existing tasks to be of fixed duration.

D.
Change the default task type to fixed duration.