Answer: C. Harmony.
Step-by-step explanation:
Group Harmony is very important in achieving objectives. When there is Harmony in a group that means that people have ACCEPTED their other group members and are working together peacefully with them. To accept a person you must UNDERSTAND them to some extent.
Being in Harmony in a group also creates a form of loyalty to the group as one feels comfortable around other members. This will lead to a COMMITMENT to decisions in other not to betray the harmony of the group.