The salivary enzyme, amylase, functions to chemically breakdown?

amylase

Any of a class of digestive enzymes, present in saliva, that break down complex carbohydrates such as starch into simpler sugars such as glucose.

me two

explanation:

because i hate it

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.