Lisa, Jennie, Rose and Jisoo are members of BTS Army, an organization whose articles are kept among themselves. Further, any one of the members of BTS Army may transact in his / her own name. a. BTS Army may sue under the name "BTS Army". b. BTS Army may be sued under the name "BTS Army" c. Both (a) and (b). d. Neither (a) nor (b)