Simplify the Expression $$5 ^ { \sqrt { 10 } } \cdot 5 ^ { \sqrt { 10 } }$$

Multiple Choice

Simplify the expression. $$5 ^ { \sqrt { 10 } } \cdot 5 ^ { \sqrt { 10 } }$$

A) $\quad 25 \sqrt { 10 }$
B) $\quad 5 ^ { \sqrt { 20 } }$
C) $25 \sqrt { 20 }$
D) $10 ^ { \sqrt { 5 } }$
E) $\quad 10 \sqrt { 20 }$