Reasoning

Detailed Solution

83. Cannot say This may be true but the article refers only to biofuel’s increasing use in transportation. Since the article does not explicitly say that all forms of transportation can use biofuels, or conversely that aircraft can use it, we are not able to tell if it can be used to power aircraft.

84. True The passage says that one type of plant used in the production of biofuels has its oil “extracted and heated to reduce viscosity”. Reducing viscosity means making a liquid less thick and freer flowing.

85. Cannot say The passage tells us that plants high in sugar content “are fermented to produce ethanol”. One might be inclined from reading that plants high in oil content have their “oil extracted and heated to reduce viscosity” do not produce ethanol but produce something else. Conversely, one could argue that plants high in sugar content could also have high oil content. However, the text does not explicitly say whether ethanol can or cannot be produced from photosynthetic plants with high oil content.

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