Groups can be open or closed. The two differ in that which statement about closed groups is true?

• A. Closed groups allow no new members after the group begins.
• B. open groups are limited to hospital settings.
• C. in an open group, members can socialize between group meetings.
• D. closed groups always employ coleaders.

Answer: (A)

Membership dynamics differentiate open and closed groups. In a closed group, no new members join after the group begins, which helps preserve continuity, trust, and a stable group process as members move through the sessions together. The other statements don’t fit the defining characteristics: open groups aren’t limited to hospital settings and can occur in many contexts; socializing between meetings is not what defines an open group; and having co-leaders is not a universal trait of closed groups, since leadership structures vary.