Question

multiple choice question
if you wanted to research the benefits of adding fluoride to tap water on the internet, which of the following is the most likely to yield the most useful results?
fluoride
what are benefits of fluoridating tap water?
are some kinds of tap water beneficial?
tap water

Explanation:

• "fluoride" is too general as it could refer to many things related to fluoride, not specifically its benefits in tap water.
• "Are some kinds of tap water beneficial?" is also too broad as it doesn't focus on fluoride in tap water.
• "tap water" is extremely general and doesn't mention fluoride at all.
• "What are benefits of fluoridating tap water?" directly asks about the benefits of adding fluoride to tap water, which is the specific topic of research.

Answer:

What are benefits of fluoridating tap water?