It's the outer membrane / cell membrane. Cells transport into and out of the Membrane
Answer: the correct answer is vinegar.
Explanation:Reducing the pain of a marine animal sting can be accomplished by rinsing the affected area with vinegar. Vinegar is an aqueous solution of acetic acid and trace chemicals which is known to deactivate the nematocysts of as some marine animals there by reducing pain.
I think the answer is D (I’m not sure tho)