You are presented with the question "Getting scraped with what can give oneself an infection?" and the following answer choices: - deoxyribonucleic acid - a knife with sanitized dirt - Roundworms. - harmful substances - Roundworms - a clean needle - a clean scapel - an infected needle Now knowing that scraping oneself on a contaminated object may cause infection and contact with infected blood, contaminated needles, choose the best answer.
A:
an infected needle