The correct answer is B. Cerebrum.
The cerebrum is the largest part of the brain and is responsible for higher functions such as thought, memory, emotion, speech, and consciousness. It is divided into two hemispheres, the left and right hemispheres. The left hemisphere is responsible for language and logic, while the right hemisphere is responsible for creativity and spatial reasoning.
The brain stem is the part of the brain that connects the cerebrum to the spinal cord. It is responsible for basic functions such as breathing, heart rate, and blood pressure.
The cerebellum is located at the back of the brain and is responsible for coordination and balance.
None of the above options are responsible for consciousness.