Two hormones in ruminants work together to bring about luteolysis. One is secreted by large luteal cells and is called _____ . The other is secreted by the uterus and is called _____ .
a) Progesterone, Estrogen
b) Luteinizing hormone (LH), Follicle-stimulating hormone (FSH)
c) Prostaglandin F2α (PGF2α), Progesterone
d) Estrogen, Luteinizing hormone (LH)