Which of the Following Statements Regarding Skeletal Muscle Is True

Which of the following statements regarding skeletal muscle is true?

A) Some skeletal-muscle fibers have pacemaker activity
B) Skeletal-muscle fibers are joined together by gap junctions
C) A given skeletal-muscle fiber will contract when excitatory nervous stimuli sufficiently exceed inhibitory nervous stimuli at the motor end plate
D) A given skeletal-muscle fiber will contract when excitatory nervous stimuli sufficiently exceed inhibitory nervous stimuli at the cell body of the motor neuron that innervates that fiber
E) None of the choices are true