Katzenbach and Smith (1993) Make the Point That Groups Do

Katzenbach and Smith (1993) make the point that groups do not become a 'team' just because someone labels them a team. In seeking to explain this concept further, they seek to differentiate between groups and teams.
What identifies a group as opposed to a team?

A) There is encouragement of open-ended discussion and active problem-solving meetings.
B) It measures effectiveness directly by its influence on each other (e.g. financial performance of the business) .
C) The group's purpose is the same as the broader organizational mission.
D) It measures performance directly by assessing collective work products.