A wife says to her husband, "Our utility bill this month is 200 yuan more than last month's. It must be because the kids are on vacation and have the air conditioning on all day, so from now on, we'll only allow the air conditioning to be on for two hours a day." In this statement, which one represents a "fact"?

Answer: A

• AThis month's utility bill is 200 yuan more than last month's.✓ Correct. The amount of the utility bill can be verified through payment records or meter readings, fitting the definition of a fact.
• BIt must be because the kids are on vacation and have the air conditioning on all day.✗ Incorrect. This is an explanation or guess about the cause of the increase, not yet verified, thus it is an opinion or assumption, not a fact.
• CFrom now on, we'll only allow the air conditioning to be on for two hours a day.✗ Incorrect. This is an action recommendation derived from the previous statements, belonging to advice or inference, not a statement of an established fact.
• DThe fact that the kids are on vacation is itself a fact, so "the air conditioning on all day" is also a fact.✗ Incorrect. The kids being on vacation needs confirmation, and "the air conditioning on all day" is even more so a guess without direct evidence. Just because part of the information seems factual does not make the whole statement factual.