Which of the Following Would Not Be a Good Idea

Which of the following would not be a good idea in an area that has a high risk for earthquakes?

A) Construct all new buildings using rigid concrete or masonry
B) Keep enough food and water for 72 hours in an easily carried backpack
C) Have hospitals install computerized earthquake warning systems that will shut down natural gas systems and turn on back-up generators
D) Require that new buildings be built to flex easily
E) All of these would be a good idea.