The Reaction of Substance a with Substance C Was Carefully

The reaction of substance A with substance C was carefully studied under conditions where the [C] remained essentially constant. The graphs of [A] vs. time and that of ln[A] vs. time both gave curves, but the graph of 1/[A] vs. time gave a straight line.

A) The reaction is therefore zero order with respect to A.
B) The reaction is therefore one-half order with respect to A.
C) The reaction is therefore first order with respect to A.
D) The reaction is therefore second order with respect to A.
E) The reaction is therefore third order with respect to A.