13 Pepsin is a protein which is produced in the stomach and is one of the main digestive enzymes found in many animals. This enzyme breaks down proteins found in food into smaller peptides. Chymotrypsin and
trypsin are also enzymes and play a similar role as pepsin in the digestive system. What is the primary
role of all digestive enzymes?
A) Increase the amount of energy needed to digest food
B) Ensure that waste products are quickly removed
C) Speed up chemical reactions involved in nutrient breakdown
D) Fight off any pathogens found in the body

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

According to edgenuity, the answer is c.

B.they all live in soil i know biology