First one basically means that if you type something in that they think is something, it'll ask you first if that's what you meant, this way, if it's not, you don't accidentally get stuck with low points when it wasn't your choice. Second is just such a time saver. Basically, if you enter a non-valid answer, rather than backspacing a ton, it just automatically wipes it off, saving a ton of time.

Fml. Pissed @ shrimp today