the steps of the action potential are listed below.

a. the nerve impulse moves down the axon.
b. the inside of the membrane becomes positive, and the outside becomes negative.
c. a stimulus is received by the dendrites.
d. the membrane has a resting potential that is positive on the outside and negative on the inside.

which of the following lists the steps in the correct order?
1)a, b, c, d
2)d, c, b, a
3)b, c, a, d
4)d, a, b, c