Botulinum toxin causes flaccid paralysis of the muscles, and is used for cosmetic purposes under the name Botox. Which of the following is the most likely mechanism of action of Botox?


Botox decreases the production of acetylcholinesterase.
Botox increases calcium release from the sarcoplasmic reticulum.
Botox blocks the ATP binding site in actin.
Botox decreases the release of acetylcholine from motor neurons.