Quiz: "bounds" or "line"?

The correct answer is: line

"Mara's comments were totally out of line. She should keep her temper under control."

Idiomatically, if someone has acted out of line they have behaved in a way that is not acceptable or right (sich daneben benehmen). 

If something is out of line with something else, it does not fit in with it (nicht zusammenpassen):

"The company's prices are so out of line with those of their competitors."

In sports, the ball is out of bounds when it goes outside the line which marks the boundary of the playing field (im Aus):

"She kicked the ball far too hard and it flew out of bounds."

If an area is out of bounds it is not to be entered by certain groups of people (gesperrt, nicht zugänglich):

"The backstage area is out of bounds to the general public."