What properties of SN2 reactions allow formation of the strained three-membered ring when halohydrins react with NaOH to produce epoxides? Choose one or more: A. Carbon-oxygen bonds are much longer than carbon-carbon bonds, so ring strain is not an issue in an epoxide. B. Intramolecular reactions can be entropically favorable as one molecule/ion breaks into two pieces. C. Three-membered rings have lower ring strain than that of larger rings. D. The position of the negatively charged oxygen atom (formed after the hydroxide ion removes the attached proton) is ideal for forming a new bond with the carbon attached to the leaving group