Which of the following sentences punctuates a parenthetical expression correctly?

A) Maitake mushrooms, not button mushrooms can lower blood pressure.

B) Native Americans used blueberries, not raspberries, to treat coughs.

C) Mint has a strong and refreshing flavor so it is not surprising, that chewing on a few leaves can get rid of bad breath.

D) White and black willow bark not green, can be made into teas that reduce aches and pains.