The Rate of Reaction Depends on the Concentration of Reactant

The rate of reaction depends on the concentration of reactant A only. Calculate the order of the reaction from the data below.
$\begin{array}{|l|l|l|}\hline \text { Initial Concentration }[\mathrm{A}] 0 / 10^{-3} \mathrm{~mol} \mathrm{dm}^{-3} & 0.025 & 0.05 \\\hline \text { Initial Rate / } 10^{-5} \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1} & 0.4250 & 1.700 \\\hline\end{array}$

A) Zero order.
B) First order.
C) Second order.
D) Third order.