Given the rationale, provide a reasonable question and answer. Step-by-step reasoning process: My ans is 16C3 = 560
 The question and answer:
Sixteen telegenic contestants with a variety of personality disorders are to be divided into two “tribes” of three members each, tribe A and tribe B, for a competition. How many distinct groupings of two tribes are possible?
Options:
(A) 120
(B) 126
(C) 252
(D) 560
(E) 1260
The answer is (D)