Add or Subtract $8 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } } + 2 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } }$

Multiple Choice

Add or subtract. Assume all variables represent nonnegative real numbers.
- $8 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } } + 2 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } }$

A) $10 z ^ { 3 } \sqrt [ 4 ] { 10 z }$
B) $- 10 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } }$
C) $10 z ^ { 2 } \sqrt [ 4 ] { 10 z ^ { 3 } }$
D) Cannot simplify