If \(d\) is the length of a diagonal of a square, what does \(d^2\) represent?
(A)the area of the square (B)twice the area of the square (C)\(\frac { 1 } { 2 } \) the area of the square (D)4 times the area of the square (E)\(\frac { 1 } { 4 } \) the area of the square
B