Urgent i need it anybody which of the following groups has achieved the most effective level of cohesion? group a is very cohesive; all members readily accept information from other members, and this them avoid any conflict. group b's members challenge and critique each other's ideas. the occasional conflict that results is focused on the issues. group c's members encourage all members to participate, but it is understood that the contributions of some members are more important to the group's success. all of the above