(A) longer days
(B) ** daylight savings time
(C) Hooverizing
(D) corn-based fuels corn-based fuels
EXPLANATIONS BELOW
Concept note-1: -Daylight-saving time was introduced as a temporary measure during World War I, as a way of conserving energy and providing more usable hours of daylight. Germany was the first to start using it, in 1916. The U.K. followed a few weeks later, and France and the U.S. followed suit.
Concept note-2: -DST was first implemented in the US with the Standard Time Act of 1918, a wartime measure for seven months during World War I in the interest of adding more daylight hours to conserve energy resources. Year-round DST, or “War Time", was implemented again during World War II.
Concept note-3: -Germany was the first country to enact daylight saving time. It took World War I for Willett’s dream to come true, but on April 30, 1916, Germany embraced daylight saving time to conserve electricity.