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) have many new buildings be made of rigid concrete or masonry
B) keep 72 hours worth of food and water 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