Describe each of the following statements as true or false. If false, rewrite the sentence to make it correct.
(a) The rate-determining elementary step in a reaction is the slowest step in a mechanism.
(b) It is possible to change the rate constant by changing the temperature.
(c) As a reaction proceeds at constant temperature, the rate remains constant.
(d) A reaction that is third-order overall must involve more than one step.