Forces inside a nation that cause people to think about leaving that nation are called what in migration theory?

Of the following groups, who gains from rent controls?

A) landlords B) construction workers and their union leaders C) poor people who have a hard time earning enough income to pay high rents D) high-income people who live in rent-controlled apartments

Based on the above information, at what price does the firm consider shutting-down?

a. $25 b. $0 c. $15 d. $10