I think the first option is the answer.
Answer:
A) They contain many carbon atoms.
Explanation:
Proteins are considered organic molecules because they are made up of carbon atoms. Proteins give your body energy and allows your body to run the way it does. Proteins also aren't considered organic molecules because they are small, because they are not used by living things, or because they contain nitrogen.
Hope this helps.
-lvr
Sample b is the control group because it’s the group not being tested and being kept the same.
Because the weight is evenly distributed