Which statement below regarding membrane structure and membrane transport is true? a. Increasing the proportion of unsaturated fatty acids of membrane phospholipids would be most likely to occur as environmental temperatures become warmer. B. Cyclization of membrane phospholipid fatty acids (like cyclopropane) would confer more rigid, straighter hydrocarbon chains. C. Membrane lipids of hyperthermophilic archaebacteria are of the ester-linked fatty acid type also found in non-archae bacteria and eukaryote membranes, respectively. D. Cell wall-containing bacteria and archaea tend to possess a slightly hypotonic interior to create a positive turgor pressure thereby helping it to maintain cell shape and form. E. Abc transporters and group translocation use a transport mechanism that moves molecules via facilitated diffusion.