Simplify the Expression $$10 \sqrt [ 4 ] { x ^ { 7 } } - 3 x \sqrt [ 4 ] { x ^ { 3 } }$$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $$10 \sqrt [ 4 ] { x ^ { 7 } } - 3 x \sqrt [ 4 ] { x ^ { 3 } }$$

A) $10 \sqrt [ 4 ] { x ^ { 7 } } - 3 x \sqrt [ 4 ] { x ^ { 3 } }$
B) $13 \sqrt [ 4 ] { \mathrm { x } ^ { 3 } }$
C) $7 x \sqrt [ 4 ] { x ^ { 7 } }$
D) $7 x \sqrt [ 4 ] { x ^ { 3 } }$