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Jackson is writing a research article on the topic of deforestation. He’s come up with the following research question about biofuels, which are fuels obtained directly from living matter:

• How has the production of plant-based biofuels led to increased deforestation?

Which of the following question sets should he use to focus in on his research?

A
What are the causes of deforestation? What should be done to combat and reverse the effects of deforestation?

B
How are biofuels more environmentally friendly than fossil fuels? What is the least environmentally friendly biofuel, and why is this so?

C
In what areas of the world is deforestation a serious problem? What mechanical techniques are being used to clear the land for biofuel crops?

D
What types of plants are used to produce biofuels? How much forest land is converted annually into plantations for the creation of biofuel crops?