They prevented people from leaving China because the desert were so hard to cross.(ANSWER D) Gobi desert was dangerous and dry, water available was little since oasis were rare. The Taklamakan desert has strorms with whip up frequency The day boils hot while the night freeze cold .In addition it has poisonous snake.
The projects that a government leader most likely use cost-benefit analysis are the type of technology used within the school, the equipment needed in the cafeteria to provide healthy or unhealthy lunches, the equipment needed for art facilities within the school
