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.