Simplify the Expression $\left( \frac { t } { 2 } \right) ^ { 4 }$

Multiple Choice

Simplify the expression. Write your answer with positive exponents only. $\left( \frac { t } { 2 } \right) ^ { 4 }$

A) $t ^ { 4 } - 16$
B) $\frac { t ^ { 4 } } { 16 }$
C) $\frac { t } { 16 }$
D) $\frac { t ^ { 4 } } { 2 }$