Summarize your conclusions from the TLC simulator. Circle the correct answer choice (bolded) in each description about TLC separation of organic compounds on silica gel plates. a) A more polar compound has a lower / higher retention factor. b) A less polar compound has a lower / higher retention factor. c) A more polar solvent causes a lower / higher retention factor. d) A less polar solvent causes a lower / higher retention factor. e) To increase the retention factor of a spot, you should add more ethyl acetate / hexane.