Janet Saw on the News Where a Family of Seven

Janet saw on the news where a family of seven children perished in a house fire-it was also revealed that the house did not contain smoke detectors.As a result she developed a persuasive speech stating that this tragedy can be avoided in everyone's home with the simple installation of a smoke detector.Janet was using which kind of proposition for her central idea?

A) proposition of value
B) proposition of fact
C) proposition of policy
D) proposition of action