Which of the Following Is a True Statement Regarding Project

Which of the following is a True statement regarding project time estimates?

A) Project time estimates for task completion and overall system quality are significantly influenced by the assignment of people to tasks.
B) Resource estimates should not be revised based upon the skills of the actual person assigned to a particular activity.
C) Staff learning can be enhanced by assigning individuals to tasks which are "over their heads."
D) Project time estimates are always on target.
E) Hardware and software are the most important, and expensive, part of project resource planning.