Adam, Ryan, Jason, and Stephen Argue About the Reason Behind

Adam, Ryan, Jason, and Stephen argue about the reason behind the fact that developed countries, like the United States and France, continue to see growth with energy consumption. Who among the following provides the most appropriate reason?

A) Adam, who says that the reason is the increased use of natural gas
B) Ryan, who says that the reason is the increased focus on clean energy technologies
C) Jason, who says that the reason is the increased use of nuclear energy
D) Stephen, who says that the reason is the increased focus on conventional thermal energy sources