If (A+B) = 16, (B+C) = 9 and (C+D) = 3, what is the value of (A+D)?	Select the correct option.
A) 10 . B) 8 . C) 7 . D) 2 . E) - 2 .

Rationale: "given a + b = 16 = > a = 16 - b - - > eq 1 b + c = 9 c + d = 3 = > d = 3 - c - - > eq 2 then eqs 1 + 2 = > a + d = 16 - b + 3 - c = > 19 - ( b + c ) = > 19 - 9 = 10 . option a . . ."
Answer: A