Which of the Following Was a Response Barrier for the Target

Which of the following was a response barrier for the target audience of the 'Earth Hour' campaign?

A) People leaping from feeling empowered to feeling ignorant about global warming
B) Americans becoming more concerned about the economy than the environment
C) Poll results showing growth of public interest in global warming
D) Public interest shifting from economic issues to worrying about global warming
E) Businesses becoming obsessed with the idea of a sustainable future