Burning fossil fuels for energy is often considered _______ because of the high carbon emissions and the finite nature of the resource. Consequently, engineers are developing solar and wind technologies to provide a cleaner, more sustainable alternative.
Which choice completes the text with the most logical and precise word or phrase?
resilient
inadequate
dynamic
satisfactory
Correct Answer: B
Choice B is the best answer. The text presents a negative view of fossil fuels ("high emissions," "finite") and contrasts them with "cleaner" alternatives. Therefore, fossil fuels are considered "inadequate" (not good enough) for future sustainable needs.
Choice A is incorrect because "resilient" means tough or recovering quickly. Choice C is incorrect because "dynamic" means energetic. Choice D is incorrect because "satisfactory" means acceptable, which contradicts the negative description and the need for alternatives.