You are tracking a project in Microsoft Office Project Standard 2007. A critical task will take 4 weeks to complete. Currently, only one resource is available to work on the task. You will add more resources later if they become available. You need the task duration to decrease if you add resources. What task type should you use?

A.
fixed units, effort-driven

B.
fixed duration, effort-driven

C.
fixed units, non effort-driven

D.
fixed duration, non effort-driven