The cerebrum controls all:

The cerebrum controls voluntary motor activities, which are activities that can be consciously controlled by the person. Autonomic functions such as breathing and heart rate are controlled by the autonomic nervous system and reflex actions are controlled by the lower brain and spinal cord. Digestive processes are controlled by the gastrointestinal tract. Therefore, the correct option is C, as it is the only one that accurately describes the role of the cerebrum.