Question

daylight saving time was invented as a way to conserve electricity during the first and second world wars. germany first started the practice, and then the u.s. and other countries followed. the governments of these countries believed that people would use less electricity to light their homes if they had extra hours of sunlight. in 1975, congress calculated the energy savings of daylight saving time. they found the program created a one percent savings in national energy use.
text 2
twice per year, most americans have to change their clocks because of daylight saving time. most people are used to the idea, but others question whether we should continue the practice. recent studies have found that the energy savings are small. in fact, some studies found an increase in electricity use during daylight saving time. in light of this finding, some people suggest that we should consider getting rid of daylight saving time altogether.
which sentence best combines the main, or central, ideas of both texts?
daylight saving time was originally created to save energy, but now some people are asking if the time change still needs to occur.
most americans believe the energy savings of daylight saving time is small, so they think the program should stop.

Explanation:

First, analyze Text 1: It explains daylight saving time (DST) was invented to save energy (e.g., Germany started, U.S. Congress found 1% savings). Text 2: Discusses that now some studies show small or even increased electricity use, so some people question continuing DST.

Now check the options:

• First option: "Daylight saving time was originally created to save energy, but now some people are asking if the time change still needs to occur." This matches both texts: original purpose (save energy) and current questioning (if it should continue).
• Second option: "Most Americans believe the energy savings of daylight saving time is small, so they think the program should stop." Text 2 says "others question" and "some people suggest", not "most Americans" believe savings are small or want to stop. So this is incorrect.

Answer:

A. Daylight saving time was originally created to save energy, but now some people are asking if the time change still needs to occur.