The Valsalva Maneuver Can Be Described as the Process of Making

The Valsalva maneuver can be described as the process of making a forceful bearing-down attempt while holding one's breath with a closed glottis and a tightening of the abdominal muscles.When is it appropriate to instruct the client to use this maneuver?

A) During the second stage to enhance the movement of the fetus
B) During the third stage to help expel the placenta
C) During the fourth stage to expel blood clots
D) Not at all