For every real number $x$, the expression $(x+1)^{2}-x^{2}$ is equal to
(A) $2 x+1$
(B) $2 x-1$
(C) $(2 x+1)^{2}$
(D) -1
(E) $x+1$
Expanding and simplifying, $(x+1)^{2}-x^{2}=\left(x^{2}+2 x+1\right)-x^{2}=2 x+1$.

ANSWER: (A)