Sophia wants to know how recycling can reduce the amount of waste in landfills. Which research question would help Sophia find the most relevant information about this topic? A. How can governments create laws that make recycling a requirement for people? B. Why does recyclable waste end up in landfills? C. What percentage of waste in landfills is made up of non-recyclable materials? D. Which is the largest landfill in the world?

The question that would help Sophia find the most relevant information about the topic is:

C. What percentage of waste in landfills is made up of non-recyclable materials?

Explanation:

The question has to have relevance to the development of the topic. Sophia wants to know how recycling can reduce the amount of waste in landfills. To have an idea of how recycling affects landfills, she needs to know how much of their waste is made up of recyclable and non-recyclable materials. From that information, Sophia will be able to determine, or at least to start researching about, whether or not recycling can have a significant impact on landfills. The more recyclable materials make up the waste, the more impact recycling can have.

With that in mind, we can safely choose letter C as the best option: C. What percentage of waste in landfills is made up of non-recyclable materials?

the answer is irony!