For this chain-of-thought reasoning and answer, what was the question?
Burning coal is one of the most wasteful energy processes.
 A: no

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Q: Is the following sentence factually correct?
"Burning coal has been the most effective for of Energy storage."
Options:
- yes
- no