Critical Chain method was developed to address several problems that are common in organizations that use traditional project scheduling. Which of the following describes a common problem addressed by the critical chain method?

A$.$

Many team members work solely on a single task until it is complete $-$ impeding work on other related activities.

B$.$

Many team members render overly optimistic estimates of the time it will take them to complete project activities.

C$.$

Many team members work best when multi$-$tasking

D$.$

Many team members tend to use all of the time available for an activity rather than completing it early.