What Is the Potential Clinical Significance for an on Ramp

What is the potential clinical significance for an on ramp on a biphasic stimulator?

A) If a muscle contraction is elicited, the on ramp provides the patient with a warning that the stimulus will be getting stronger.
B) If a muscle contraction is elicited, the on ramp provides the patient with the opportunity to hold the contraction after the stimulus has ended.
C) The on ramp prevents the clinician from turning the stimulus up too quickly.
D) The on ramp prevents the clinician from turning the stimulus off too quickly.