In a Crayfish, the Receptor Potential of a Stretch Receptor's

In a crayfish, the receptor potential of a stretch receptor's cell body

A) is the result of an action potential from the same cell.
B) ends when ion channels in the cell's dendrites are opened.
C) starts at the axon hillock.
D) increases when the muscle is stretched.
E) is created by the opening of ion channels in the axon.