According to the textbook, which of the following is a distinctive characteristic of work groups? A. Work groups are social systems that have boundaries, with members who have different roles and are dependent on each other. B. Work groups are organizational systems that have boundaries, with members who have different roles and are dependent on each other. C. Work groups are social systems that have boundaries, with members who have similar roles and are often dependent on each other. D. Work groups are organizational systems that have boundaries, with members who have similar roles and tasks