For certain chemical reaction $X\to Y$, the rate of formation of product is plotted against the time as shown in the figure. The number of $\mathrm{\underline {correct} }$ 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.