A certain alkyl halide $($RX$)$ undergoes an elimination reaction $($forming an alknne procluen$)$ whens treated with $C{H}_{3}O.$ A kinctic study finds that the $C{H}_{3}O$ reacts with the alky hallow in a concerted, single step to form the alkene product. What is the rate law tor the rescalon?

A$.$ Rate $=k$

B$.$ Rate $=k(Rx)(C{H}_{3}O)$

C$.$ Rate $=k(Rx)$

D$.$ Rate $=k(C{H}_{3}O)$