Which Statement Is Correct in Regard to the Muscle Relaxant

Which statement is correct in regard to the muscle relaxant botulinum toxin type B (Myobloc) ?

A) It can be classified as a cholinergic agonist.
B) Increased muscle strength is often seen within a couple of weeks.
C) It can take 6 months for the effects to be seen.
D) In high doses, it is poisonous, causing the same symptoms food poisoning does.