Final answer:
Increasing the diameter of the axon and increasing the resistance of the axon membrane to ion leakage will best increase the conduction rate of action potentials.
Step-by-step explanation:
The conduction rate of action potentials can be increased by increasing the diameter of the axon and increasing the resistance of the axon membrane to ion leakage. By increasing the diameter of the axon, ions can spread faster and with less resistance, resulting in faster conduction. Additionally, by increasing the resistance of the axon membrane to ion leakage, the action potential can travel further without loss of signal.