I think it’s this but i might be wrong i’m not 100% sure
pharmacological
C. the safety of those involved in conflicts
The major function of the large intestine is to absorb water from the remaining indigestible food matter and transmit the useless waste material from the body.
Pretty confident that it is A, judging by that the word composition is used as a combination or a ratio of 2 things. Also none of the other options make sense.