Final answer:
Oxytocin is administered to postpartum clients in certain situations. Indications for its administration include excessive bleeding and uterine atony.
Step-by-step explanation:
Oxytocin is a hormone that is involved in the contraction of the uterine wall muscles during childbirth. It is administered to postpartum clients in certain situations. Indications for the administration of oxytocin include excessive bleeding (a) and uterine atony (b), which is the lack of normal muscle tone in the uterus. Elevated blood pressure (c) and maternal tachycardia (d) are not indications for the administration of oxytocin.