Ten telegenic contestants with a variety of personality disorders are to be divided into two “tribes” of four members each, tribe A and tribe B, for a competition. How many distinct groupings of two tribes are possible?  Choose the correct option:
A) 120
B) 126
C) 210
D) 1200
E) 1260
My ans is 102104 = 210   210
<result>C</result>
Ten telegenic contestants with a variety of personality disorders are to be divided into two “tribes” of four members each, tribe A and tribe B, for a competition. How many distinct groupings of two tribes are possible?