For certain chemical reaction X → Y , the rate of formation of product is plotted against the time as…

For certain chemical reaction $\mathrm{X}\to \mathrm{Y}$, the rate of formation of product is plotted against the time as shown in the figure. The number of Correct statement/s from the following is _____ 

(A) Over all order of this reaction is one
(B) Order of this reaction can't be determined
(C) In region-I and III, the reaction is of first and zero order respectively
(D) In region-II, the reaction is of first order
(E) In region-II, the order of reaction is in the range of $0.1$ to $0.9$.