Which of the Following Is One Reason Why Chemical Signals

Which of the following is one reason why chemical signals sent through the synapse lead to greater complexity than the signals of action potentials?

A) Chemical signals at the synapse are all-or-none events.
B) Chemical signals sent through the synapse can be either excitatory or inhibitory.
C) Chemical signals always result in hypopolarization.
D) Chemical signals always result in hyperpolarization.