A skeletal muscle twitch differs from a tetanic contraction in that:

a. the muscle twitch is a brief and "jerky" movement, while the tetanic contraction is prolonged and continuous

b. the muscle twitch occurs only in small muscles while a tetanic contraction occurs in large muscle groups

c. the tetanic contraction is caused by a single stimulus, while the twitch is caused by very rapid multiple stimuli

d. the tetanic contraction is considered abnormal, while the twitch is a normal muscle response

e. the muscle twitch is prolonged and continuous while a tetanic contraction is brief and "jerky"