3) Which of the following expressions represents the square of the triple of the consecutive integer of an integer $n$?
(A) $[3(n+1)]^{2}$
(B) $3 n^{2}+1$
(C) $(3 n+1)^{2}$
(D) $3\left(n^{2}+1\right)$
(E) $3(n+1)^{2}$.
3) The answer is $(\mathrm{A})$.

Instead:

(B) corresponds to the consecutive of the triple of the square of $n$,

(C) is the square of the consecutive of the triple of $n$;

(D) is the triple of the consecutive of the square of $n$;

(E) is the triple of the square of the consecutive of $n$.