Which of the following would probably result after poisoning by one of ... ...

Which of the following would probably result after poisoning by one of the agents described in the passage?
(A) The heart would stop, since no messages from the nervous system could signal it to contract.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 17. The Integumentary, Skeletal, and Muscular Systems: Protection, Support, and Movement