Have Countdown Signals at Crosswalks Made People Safer

Have countdown signals at crosswalks made people safer?

A) yes, because drivers' attention is now more focused on the crosswalks and they are more aware of people crossing the road
B) yes, because everyone is better informed of the changing lights
C) no, because people are being more aggressive with the additional information
D) no, because drivers must take more time processing the information and are not focusing on driving