C. It is an incredibly long molecule with thousands of genes.
The answer is A. macromolecules
There are 4 types of macromolecules; lipids, proteins, carbs and nucleic acids
Pineapples, unlike most other fruit, contain an enzyme called bromelain, that breaks up the gelatin into it's amino acid building blocks. [Enzymes are biomolecules that catalyze chemical reactions; most of them are proteins themselves.] Due to the bromelain, your jello doesn't become (or stay) solid.
