Which of the Following Best Defines a Pyrolysis Reaction

Which of the following best defines a pyrolysis reaction?

A) It is a reaction in which a -H of an arene is replaced by an electrophilic group.
B) It is a high-temperature decomposition reaction that can be used to form fibers of synthetic polymers.
C) It is a reaction that proceeds by eliminating the elements of water.
D) It is an electrochemical process in which an external voltage is applied to an electrolytic cell to drive a nonspontaneous reaction.
E) It is a catalytic reaction in which a catalyst is uniformly dispersed throughout the reactant mixture to form a solution.