What is the subject of this passage

A．It means to rent a house for 25 years.
B．It means to buy an old house at a low price.
C．It means to borrow money from a bank to buy a house.
D．It means to borrow money form a friend to buy a house.

A．He believes that history professor are poorly prepared.
B．He believes that most students are lazy.
C．He believes that professors tail to present facts in an interesting way.
D．He believes that most students feel that history is a waste of time.