The nurse is conducting a prepared childbirth class and is instructing pregnant clients about the method of effleurage . The nurse instructs the clients to perform the procedure by doing which action?None
选项：

A:Contracting and then consciously relaxing different muscle groups
B:Massaging the abdomen during contractions, using both hands in a circular motion
C:Instructing the partner to stroke or massage a tightened muscle by the use of touch
D:Contracting an area of the body, such as an arm or leg, and then concentrating on letting tension go from the rest of the body