The correct answer should be informal.
Informal level of language involves the use of slang words, and <em>cool </em>is a slang word, so this sentence cannot be formal by any means. It is also not general due to a slang word being used. Substandard language would mean that it is not grammatically correct, and this sentence is, so this is also incorrect.
So that Macbeth can become king and he believed the witches who for told his fate.
You don't list any choices, but colloquialisms are used in informal speech. Hope it helps.
Answer:
To stay up late working on a project or task.
Explanation:
Is it correct?
