Rewrite the Expression $u ^ { 3 } \sqrt [ 3 ] { u }$

Multiple Choice

Rewrite the expression $u ^ { 3 } \sqrt [ 3 ] { u }$ using rational exponents.

A) $u ^ { 2 / 3 }$
B) $u ^ { 8 / 3 }$
C) $u ^ { 10 / 3 }$
D) $u ^ { 7 / 3 }$
E) $u ^ { 4 / 3 }$