Add or Subtract $$\sqrt [ 3 ] { 27 y } - \sqrt [ 3 ] { 128 y }$$

Multiple Choice

Add or subtract. Assume all variables represent positive real numbers.
- $$\sqrt [ 3 ] { 27 y } - \sqrt [ 3 ] { 128 y }$$

A) $4 \sqrt [ 3 ] { 2 y } - 3 \sqrt [ 3 ] { y }$
B) $3 \sqrt [ 3 ] { y } - 4 \sqrt [ 3 ] { 2 y }$
C) $3 - 4 \sqrt [ 3 ] { 2 }$
D) $7 \sqrt [ 3 ] { y }$