WHICH OF THE FOLLOWING IS THE BEST TITLE FOR THE PASSAGE

câu 46. - DE THI TIENG ANH ĐH CĐ HAY CO DAP AN
DE THI TIENG ANH ĐH CĐ HAY CO DAP AN
Câu 46. Which of the following is the best title for the passage ?A. The World Organization B. The Eradication of smallpox C. Smallpox vaccinations D. Infectious disease