D should be the right answer. :)
After increased fear of nuclear attacks during the cold war, materials to build fall out shelters were distributed by the government and other organizations. The shelters were meant to protect people from radiation in case of a nuclear attack.
The government communicated about the fallouts to the public in several ways:
i) Schools were supposed to have drills and study materials on how to be protected.
II) Information booklets were distributed accompanied by frequent radio PSAs
iii) Children songs were created with information on nuclear preparedness.
iv) Public videos were made and shown to the public i.e. "Duck and Cover" film for kids.
A. they eliminated competition and drove up prices for consumers
