Fact 1: Some viruses have an envelope of phospholipids and proteins. Fact 2: Some viruses are also enclosed by an envelope of fat and protein molecules. Given the two facts above, answer the question "What are some viruses enclosed by? " with the following options: - sub-units of species - phospholipids, fat, molecule - Germy surfaces - it keeps an organism warm - Something that comes in a bundle of fibers - Something made from fermented ricce - microorganisms - A compound that donates proton
A:
phospholipids, fat, molecule