Answer: A) Jimmy Carter
In 1979 Jimmy Carter had a solar water heater installed on the White House roof. It was a move designed to support Carter's solar institute, which he had "created to spearhead solar innovation." Unfortunately, once Ronald Reagan (who "viewed alternative energy with open scorn") made it into office, the solar water heater was removed, the budget for the solar institute was slashed, and tax credits were allowed to expire (in 1985).
Source: http://www.motherjones.com/news/feature/2000/03/solar.html (MotherJones.com)