Which of the Following Statements Regarding Skeletal-Muscle Contraction Is True

Which of the following statements regarding skeletal-muscle contraction is true?

A) The tension developed during the contraction of a muscle fiber is dependent upon the initial length of the fiber
B) There is a positive correlation between muscle-fiber length at the beginning of a contraction and the tension that can be developed by the fiber: the longer the fiber, the greater the tension
C) There is a positive correlation between the frequency of action potentials in a single muscle fiber and the tension it can develop: the greater the frequency, the greater the tension, up to a plateau
D) Both the tension developed during the contraction of a muscle fiber is dependent upon the initial length of the fiber and there is a positive correlation between muscle-fiber length at the beginning of a contraction and the tension that can be developed by the fiber: the longer the fiber, the greater the tension are true
E) Both the tension developed during the contraction of a muscle fiber is dependent upon the initial length of the fiber and there is a positive correlation between the frequency of action potentials in a single muscle fiber and the tension it can develop: the greater the frequency, the greater the tension, up to a plateau are true