The correct answer would be #3.
The immune system is the body's first line of defense against pathogens.
0.15 percent
BAC is the blood alcohol level in the body, and your body is able to eliminate about 0.15% of the blood alcohol present per hour. When a person consumes alcohol, 10% of the alcohol is lost from breath, sweat and urine. The remaining 90% is metabolized in the body.
