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

this would be a math

thinking it would be physical characteristics