A, B , C , and D are four towns, any three of which are non-collinear. Then, the number of ways to construct three roads each joining a pair of towns, so that the roads do not form a triangle, is ?

A, B , C , and D are four towns, any three of which are non-colline

1.	A, B , C , and D are four towns, any three of which are non-collinear. Then, the number of ways to construct three roads each joining a pair of towns, so that the roads do not form a triangle, is ?
A.	7
B.	8
C.	9
D.	24
Answer» E.