A is 3 years older to B and 3 years younger to C, while B and D are twins. How many years older is C to D?	Choose the correct choice
A) 20	B) 3	C) 6	D) 12	E) 2
B is 6 years younger to C.   B and D are twins.   Hence C is 6 years elder to D.   ANSWER:6
<result>C</result>
A is 3 years older to B and 3 years younger to C, while B and D are twins. How many years older is C to D?