If $A$ Is A $3 \times 3$ Matrix And $A+B=$ Is The $3 \times 3$

Multiple Choice

If $A$ is a $3 \times 3$ matrix and $A+B=$ is the $3 \times 3$ zero matrix, what can you say about the matrix?

A) B is the $3 \times 3$ zero matrix
B) $\mathrm{B}=-\mathrm{A}$
C) B is the $3 \times 3$ identity matrix
D) $B=A$