Simplify, Where Possible $$4 x + 10 x$$ A) $40 x$ B) $14 x ^ { 2 }$

Multiple Choice

Simplify, where possible.
- $$4 x + 10 x$$

A) $40 x$
B) $14 x ^ { 2 }$
C) $14 \mathrm { x }$
D) $28 x$