If (A-B-C+D = 13) and (A+B-C-D = 3), what is the value of (B-D)^2?	Choose the most appropriate option: A) 4 . B) 8 . C) 12 . D) 25 . E) 64 .

Rationale: "eq 1 : a - b - c + d = 13 eq 2 : a + b - c - d = 3 ( 1 ) subtract eq 1 from eq 2 a - b - c + d = 13 - a + b - c - d = 3 - - - - - - - - - - - - - - - - - - - - - - - - - 2 b + 2 d = 10 ( 2 ) simplify - b + d = 5 b - d = - 5 ( b - d ) ^ 2 = ( - 5 ) ^ 2 = 25 my answer : d"
Answer: D