In response to a stimulus, skeletal muscle fibers:

In skeletal muscle:
   A. the fewer the number of muscle fibers responding to a stimulus, the greater the strength of the contraction    
   B. The greater the number of muscle fibers responding to a stimulus, the greater the strength of the contraction    
   C. the actual number of muscle fibers responding to a stimulus has no effect on the strength of the contraction


In response to a stimulus, skeletal muscle fibers:
   A. Always contract to 25% of their potential ability    
   B. Always contract to 50% of their potential ability    
   C. Always contract 100% of their potential ability    
   D. None of the above