Which result is most likely if the digestive system fails to work properly? A. The excretory system will produce excess waste products
B. The body supply of oxygen will be too low to sustain life
C. The reproduction system will be unable to produce gametes
D. The body's cells will be unable to receive the nutrients necessary for energy products

d

Explanation:

The most common problems associated with the digestive tract are diarrhea, constipation, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and heartburn. These can be caused by many things, such as an unhealthy lifestyle, poor nutrition, a food sensitivity or even an infection.

Because of this we can assume that the answer is d

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

i think the answer is a.keratin is the pigment responsible for skin color.