Question

According to the passage, what is the primary reason for the continued reliance on fossil fuels? 
 

• A. Fossil fuels are more environmentally friendly.
• B. Renewable energy sources are too expensive.
• C. The transition to cleaner energy is constrained by economic and infrastructure issues.
• D. Fossil fuels are rapidly depleting.
• E.

Hint:

When a passage discusses “reasons” or “causes,” focus on the phrases that explain why something continues or happens — in this case, “economic and infrastructure constraints.”

Answer 1

The Correct Option is C

Step 1: Understanding the passage. 
The passage states that despite rapid advancements in renewable energy, fossil fuels still play a major role in the global energy system. This implies that there are barriers preventing a quick transition to cleaner energy sources. 
Step 2: Identifying the reason. 
It clearly mentions that the shift toward cleaner energy will take decades because of economic and infrastructure constraints. These constraints make it difficult to replace fossil fuels quickly, even though renewable technologies are improving. 
Step 3: Evaluating options. 
(A) is incorrect because fossil fuels are not environmentally friendly. 
(B) is partially true in some contexts but not the key point mentioned in the passage. 
(C) directly reflects the explanation given in the passage about economic and infrastructure barriers. 
(D) contradicts the passage since it discusses reliance, not depletion. 
Step 4: Conclusion. 
Hence, the main reason for continued reliance on fossil fuels is the economic and infrastructural challenges that slow down the transition to renewable energy. 

Final Answer: (C) The transition to cleaner energy is constrained by economic and infrastructure issues.