Barrier methods. That's condoms and stuff. Withdrawal prevents sperm from getting in at all (theoretically) and the rest merely make ingress of sperm meaningless.
Answer:
Alison works as a radiologic technologist.
Explanation: Radiologic technologists are the health care professionals who perform diagnostic imaging procedures, such as X-ray examinations, magnetic resonance imaging (MRI) scans and computed tomography (CT) scans.
Each year roughly 1 in 6 Americans (or 48 million people) gets sick, 128,000 are hospitalized, and 3,000 die of foodborne diseases.
