A、Because they can fully enjoy themselves late at night. B、Because they can fully concentrate their attention late at night. C、B

Is there any worse feeling than waking up late?
    Whether it’s your mom screaming for you to wake up or your iPhone buzzing with messages from work, there’s no worse way to experience the light of day than with a swelling pit at the bottom of your stomach that drops at the moment of consciousness.
    (23) The worst part is you can’t justify your actions. You want to tell your mom why you’re so tired—because you stayed up till 2 am, reading the most fascinating book.
    The same will happen with your boss. You can’t explain that you were late for the third time this month because you were researching the life of an earthworm. People don’t want to hear your "excuses." They want you to get yourself together.
    To you, there’s nothing to wake up for but so much to stay awake through. (24) That’s when your ideas happen, your bursts of energy explode and your moments of peace come over you: when there are no distractions, no plans and no obstacles in your way but the expanding horizon of light.
    That’s also why you’re smarter. According to research published in The Huffington Post, those who deviate from the normal sleep schedule are considered more intelligent. This finding is supported by research suggesting that those who create new evolutionary patterns are the most progressive.
    It makes sense. After all, those who are the first to change are always the most progressive and intelligent in a society. And according to researchers at the University of Madrid, after analyzing the sleeping patterns of 1,000 students, (25) they found that those who went to bed later scored higher on inductive reasoning tests—a test normally associated with general intelligence.
Questions 22 to 25 are based on the passage you have just heard.
22. What is this passage mainly talking about?
23. What is the worst part of waking up late?  
24. Why do some people prefer to stay up late?
25. On which aspect do the people who go to bed late score higher?