B. The air you breathe.
Because the rest of the choices are not environmental factors. Gang activity, and access to jobs and education are not environmental because environment are things about the world.
People with lupus, the immune system mistakenly attacks the body's own natural tissues. most of the time immunosuppressives work to downregulate (suppress) this attack by interfering with the synthesis of DNA, the material in the cells that contains the blueprints for all of your genetic information!!
Answer:
here's the answer what u want
An MRI is needed when doctors think there is inflammation, a tumor, or something medically wrong with the brain that we can't see on the outside.
