Add or Subtract $6 \sqrt [ 4 ] { 6 } + 5 \sqrt [ 3 ] { 6 }$

Multiple Choice

Add or subtract. Assume all variables represent positive real numbers.
- $6 \sqrt [ 4 ] { 6 } + 5 \sqrt [ 3 ] { 6 }$

A) $11 \sqrt [ 3 ] { 6 }$
B) $6 \sqrt [ 4 ] { 6 } + 5 \sqrt [ 3 ] { 6 }$
C) $11 \sqrt [ 4 ] { 6 }$
D) $30 \sqrt [ 4 ] { 36 }$