A committee with 20 members votes for the candidates A,B,C by a different election system. Each member writes his ordered prefer list to the ballot (e.g. if he writes BAC, he prefers B to A and C, and prefers A to C). After the ballots are counted, it is recognized that each of the six different permutations of three candidates appears in at least one ballot, and 11 members prefer A to B, 12 members prefer C to A, 14 members prefer B to C. How many members are there such that B is the first choice of them? <spanclass=′latex−bold′>(A)</span>5<spanclass=′latex−bold′>(B)</span>7<spanclass=′latex−bold′>(C)</span>8<spanclass=′latex−bold′>(D)</span>10<spanclass=′latex−bold′>(E)</span>More information is needed