By 2 to 3 weeks, breastfeeding mothers and babies have a system for efficient nursing in the sense that the mother exhibits __________ when the baby cries and the baby _______________ when brought to the breast.
a. a rooting response; coordinates rooting, sucking, and swallowing
b. a let-down feeling; a grasping response
c. a hormonal response; a matching hormonal response
d. a hormonal response; coordinates rooting, sucking, and swallowing
