In a Tetanus Shot,patients Are Injected with Small Amounts of Tetanospasmin,a

In a tetanus shot,patients are injected with small amounts of tetanospasmin,a toxin produced by the Clostridium tetani,the bacterium that causes tetanus.The gene for this protein is carried on a plasmid in the bacterium.Which of the following is true of this gene?

A) It can enter another bacterium by transformation.
B) It cannot go through vertical gene transfer.
C) It is found in the nucleus of the Clostridium tetani.
D) It cannot go through horizontal gene transfer.
E) It is part of the Clostridium tetani chromosome.