​When there are economies of scale,

A) ​per-unit costs increase as output increases
B) per-unit costs decrease as output increases
C) per-unit costs are constant as output increases
D) ​output does not affect per-unit costs

In a functional team-maintenance role,what do members use to offer verbal and nonverbal support to seek input from other team members?

A) Encouragement
B) Compromise
C) Procedure setting
D) Control
E) Harmonizing