The main function of colon in mammals is to
A temporarily storage of excretory products
B Absorb water from undigested food
C Absorb Digested food
D digest cellulose
E Produce enzymes used in other parts of the alimentary canal

Sorry, i can't answer your question using the options but I feel..

The colon’s function is threefold:
1)to absorb the remaining water and electrolytes from indigestible food matter
2)to accept and stores food remains that were not digested in the small intestine and
3) to eliminate solid waste (feces) from the body.

I hope my answer help's you.!!