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 from the following answers.
A) 2
B) 3
C) 6
D) 12
E) 14
Explanation:   Since B and D are twins, so B = D.   Now, A = B + 3 and A = C - 3.   Thus, B + 3 = C - 3 D + 3 = C-3 C - D = 6.   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?