What happens when a loan company gets bought out by another company?

Do they foreclose you house?
Do they make you re buy your home?
Will you just be making payments to the new company?
Will you lose your home because the mortgage company you were using gets bought out by another company?
What happens? Do they kick you out?
My friend is having problems with this and she told me they had 11 days to get out can they really do that to someone?
Will they take the mortgage over?

The answer is c) You simply make payments to the new company. When loan company A buys loan company B, loan company A now owns all property that loan company B previously owned. So now A owns your house, and instead of paying B you're paying A.