ONE USER CAN BE A MEMBER OF MANY GROUPS, THOUGH ONLY ONE MEMBERSHIP IS ACTIVE AT ANY TIME

2. þ B. One user can be a member of many groups, though only one membership is active at any time.ý A, C, and D. A is wrong because there can be a many-to-many relationship between users and groups. C is wrong because it is possible to put other users in the SYS group. D is wrong because SYS and SYSTEM are, by default, in the SYS_GROUP group.