Which of the following statements represents a strategy that is desirable for making effective teams? a) combining people with extremely high and extremely low abilities make a balanced team. b) individuals should ideally have one role in a team as multiple roles reduce their effectiveness and efficiency. c) diversity should be avoided as diverse teams involve a lot of conflict in day-to-day functioning. d) if a natural work unit is larger, its size must be maintained for the nature of the job requires large team