You Have Been Called for a 13-Year-Old Boy Who Was

You have been called for a 13-year-old boy who was caught sniffing glue by his parents. The boy is lethargic and confused and complaining of "burning" in his mouth and nose, as well as nausea and vomiting. Based on the clinical presentation and mechanism of illness, how has this poison affected the boy's brain?

A) Absorbing through the small intestine into the bloodstream and then on to the brain
B) Directly contacting the brain by crossing the mucous membranes of the mouth and nose
C) Crossing from the lungs into the bloodstream and then circulating to the brain
D) Absorbing fumes through the skin, nose, and eyes and then on to the brain