The term <em>slang</em> refers to <u>informal language</u> and it is usually considered to carry negative connotation, because it stands out from the standard, formal language.
So the answer here is that the connotation of <em>slang</em> in the second sentence is that:
The word <u>legitimate</u> helps us understand this, that even though slang was considered a bad thing, through time those words gained full meaning and are now commonly used.
Phrase. If something is at stake, it is being risked and might be lost or damaged if you are not successful. The tension was naturally high for a game with so much at stake.
"you" is an understood subject most often in IMPERATIVE sentences. these are commands, like, "go to your room" or "have a seat."
in those sentences, the subject is "(you) go to your room" or "(you) have a seat."
in the answer choices: mr. burghart is the subject in choice A. "we" is the subject in choice B. "looks" is the subject in choice D.
C has the understood you: (you) please have another glass of orange juice. because it's a command, it's assumed that you're addressing a certain person (you).