I'll give you a question, please answer with step-by-step reasoning process.
There are different kinds of Meningitis, but it is an illness that affects the what?\nOptions:\n- brain\n- nursing home\n- nail\n- hospital\n- doctor's office

brain
Meningitis is a serious disease in which there is swelling of the three membranes that line the skull and vertebral canal and enclose the brain and spinal cord.

Meningitis is an illness that affects the brain as there is a swelling in meninges a part or portion of brain.

.

The answer is brain