Which statement best explains how the number of mitochondria in a cell relates to the specialization of a cell? a. muscle cells are easily destroyed. since mitochondria are protein factories, they aid in the rebuilding of muscle cells. b. muscle cells function in movement. since cellular respiration releasing atp occurs in the mitochondria, the muscle cells have a steady supply of energy. c. muscle cells must function as a unit. mitochondria serve as the link between muscle cells, which enable them to carry out the function of moving the skeleton. d. mitochondria aid in the transport of nutrients through the cell. since muscle cells require a steady supply of energy, many mitochondria are needed for this job.