Below Is a Plot of the Reaction of a Decomposing

Below is a plot of the reaction of A decomposing to form products. Based on the figure, which might be the order of the reaction with respect to A?

A) The reaction must only be zeroth order in A.
B) The reaction must only be first order in A.
C) The reaction must only be second order in A.
D) The reaction could be either first order in A or second order in A.
E) The reaction could be of any order in A.