Which of the Following Statements Best Explains How Tetanus Can

Which of the following statements best explains how tetanus can be generated in a skeletal muscle,given the all-or-none nature of action potentials?

A) During a single action potential in a skeletal muscle, there is not enough time for all of the calcium in the sarcoplasmic reticulum to diffuse into the cytosol and bind to troponin
B) Skeletal muscle has no absolute refractory period
C) Skeletal muscle has a much longer absolute refractory period than does a motor neuron
D) During a single action potential in a skeletal muscle, there is not enough time for maximal tension to develop before the Ca-ATPase begins sequestering calcium ions
E) Both during a single action potential in a skeletal muscle, there is not enough time for all of the calcium in the sarcoplasmic reticulum to diffuse into the cytosol and bind to troponin and skeletal muscle has a much longer absolute refractory period than does a motor neuron are correct