Simplify the Expression by Combining Any Like Terms $8 x + x - 2 x + x$

Multiple Choice

Simplify the expression by combining any like terms.
- $8 x + x - 2 x + x$

A) $x ^ { 2 } + 6 x$
B) $- x ^ { 2 } + 6 x$
C) $8 x$
D) $6 \mathrm { x }$