Methylergonovine (Methergine) is prescribed for a woman to treat postpartum hemorrhage.. Amount of lochia

Methylergonovine (Methergine) is prescribed for a woman to treat postpartum hemorrhage. Before administration of methylergonovine, the priority nursing assessment is to check the:
a) Uterine tone
b) Blood pressure
c) Amount of lochia
d) Deep tendon reflexes.