The rate equation for the reaction 2 A + B → C is found to be rate = k[A][B]. For this reaction, we can conclude that 

(a) The units of k = s‾¹;

(b) t_1/2 is constant;

(c) The value of k is independent of the values of [A] and [B]; 

(d) The rate of formation of C is twice the rate of disappearance of A.