The correct answer is C. Medulla oblongata.
The medulla oblongata is the lower part of the brainstem that connects the brain to the spinal cord. It is responsible for many basic functions, including breathing, heart rate, and blood pressure. It also contains the vomiting center, which controls the urge to vomit.
The cerebellum is located at the back of the brain and is responsible for coordination and balance. The cerebrum is the largest part of the brain and is responsible for higher functions, such as thinking, memory, and language. The cortex is the outermost layer of the cerebrum and is responsible for higher-level functions, such as consciousness, thought, and voluntary movement.
The medulla oblongata is the most important part of the brainstem because it controls many vital functions. If the medulla oblongata is damaged, it can lead to death.