4. Animal cells do not have cell walls, but plant cells do. What osmotic environment is the best to them? (A) animal cells: isosmotic; plant cells: hyperosmotic (B) animal cells: hyperosmotic; plant cells: hyperosmotic (C) animal cells: hyperosmotic; plant cells: isosmotic (D) animal cells: isosmotic; plant cells: hypoosmotic (E) animal cells: hypoosmotic; plant cells: hypoosmotic