Evaluate the Radical Expression (If Possible)without Using a Calculator $- \sqrt [ 4 ] { 2 ^ { 4 } }$

Multiple Choice

Evaluate the radical expression (if possible) without using a calculator. $- \sqrt [ 4 ] { 2 ^ { 4 } }$

A) 2
B) -16
C) 16
D) -2
E) not possible