Read the following passage and answer the question. "Handwashing is one of the most effective methods for preventing the spread of infectious disease. The Centers for Disease Control and Prevention recommend washing hands with soap and water for at least 20 seconds, particularly before preparing food, after using the restroom, and after caring for someone who is ill. When soap and water are not available, an alcohol-based hand sanitizer containing at least 60% alcohol may be used as an alternative." What is the main idea of this passage?
- A.Alcohol-based sanitizers are more effective than soap and water
- B.Handwashing with soap and water for 20 seconds prevents infectious disease spread
- C.The CDC recommends washing hands before every meal
- D.Hand hygiene is important only for healthcare workers
Show answer & rationale
Correct answer
B. Handwashing with soap and water for 20 seconds prevents infectious disease spread
Rationale
B is correct: The passage opens by stating that handwashing is one of the most effective prevention methods and then supports this claim with specific CDC recommendations. The main idea is that proper handwashing (soap, water, 20 seconds) prevents infectious disease spread. A is incorrect: The passage presents alcohol-based sanitizer as an alternative when soap is unavailable, not as superior to soap and water. C is incorrect: The passage mentions food preparation as one of several occasions, not the only one, and 'every meal' overstates the recommendation. D is incorrect: The passage makes no such restriction; it applies to everyone.
Key concepts