Draw a diagram and add annotated label a labelled drawing that provides an explanation for each label Showing how exhalation is demonstrated using the Cold drink bottle​

the answer is c

explanation:

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

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.