Which Is the Appropriate Disposal Method for Used Insulin Syringes

Which is the appropriate disposal method for used insulin syringes at home?

A) Engage the safety cap over the needle and place it in the recycle bin.
B) Remove the needle from the syringe and then flush it down the toilet.
C) Place the used syringes in a sharps container that is mailed back for destruction.
D) Place the used needles in a plastic can that is placed in the center of the trash bin.