People Sometimes Perform to Expectations, Their Effort Will Expand to Fill

Multiple Choice

People sometimes perform to expectations, their effort will expand to fill the whole number of scheduled days allotted,

A) even if the number of resources assigned to the task is reduced.
B) even if the activity could have been performed in a shorter time.
C) even if part of the time for the task is waiting time.
D) even if the activity could have been performed in a longer time.