问题
根据方阵的幂运算规律，$\boldsymbol{A}^{k}$ $\boldsymbol{A}^{l}$ $=$ $?$选项
[A]. $\boldsymbol{A}^{k}$ $\boldsymbol{A}^{l}$ $=$ $\boldsymbol{A}^{k^{l}}$[B]. $\boldsymbol{A}^{k}$ $\boldsymbol{A}^{l}$ $=$ $\boldsymbol{A}^{\frac{l}{k}}$
[C]. $\boldsymbol{A}^{k}$ $\boldsymbol{A}^{l}$ $=$ $\boldsymbol{A}^{k l}$
[D]. $\boldsymbol{A}^{k}$ $\boldsymbol{A}^{l}$ $=$ $\boldsymbol{A}^{k+l}$
$\boldsymbol{A}^{\textcolor{orange}{k}}$ $\boldsymbol{A}^{\textcolor{cyan}{l}}$ $=$ $\boldsymbol{A}^{\textcolor{orange}{k} \textcolor{yellow}{+} \textcolor{cyan}{l}}$