Arrange the Following Events in the Proper Sequence

Multiple Choice

Arrange the following events in the proper sequence:
1) Efferent neuron reaches threshold and fires an action potential.
2) Afferent neuron reaches threshold and fires an action potential.
3) Effector organ responds by performing output.
4) Integrating center reaches decision about response.
5) Sensory organ detects change in the environment.

A) 2, 3, 5, 1, 4
B) 5, 2, 4, 1, 3
C) 5, 1, 4, 2, 3
D) 5, 3, 4, 2, 1
E) 3, 1, 4, 2, 5