The sentences that should be removed or revised to eliminate logical fallacies and improve clarity in the statement are:
"Everyone supports the transition to alternative energy sources, so it's guaranteed to happen."
"Replacing fossil fuels entirely will happen effortlessly and in a short period."
How to explain
The first sentence presents a fallacious argument based on an assumption of universal agreement, while the fourth sentence presents an overly optimistic and unrealistic claim about the ease and swiftness of replacing fossil fuels with alternative sources without considering the complexities and challenges involved.
The Complete Question
"Among the following sentences, which ones should be removed or revised to eliminate logical fallacies and enhance clarity in the statement, 'With time and effort, we can replace fossil fuels with alternative sources of energy'? Choose two options."
Sentences:
"Everyone supports the transition to alternative energy sources, so it's guaranteed to happen."
"Fossil fuels have been the primary energy source for centuries; changing that now is impossible."
"Renewable energy sources are widely available and accessible to all."
"Replacing fossil fuels entirely will happen effortlessly and in a short period."