Question

Which is the most important advantage of having time zones?
$A)$ to be different than another part of the country
$B)$ to get to work on time
$C)$ to make clock time the same for large parts of Earth
$D)$ None of these

Answer 1

Hint: The word Time Zone, as well as the number of regular time zones, is disputed and debated by different sources. In general, we don't talk about time zones much in our everyday lives. Time Zones are typically represented by three or four letters and are specified by your country's government or an astronomical institute.

Complete answer:
A time zone is a geographical area with a consistent standard time that is used for legal, commercial, and social purposes. Time zones tend to suit the borders of countries and their subdivisions so it is convenient for places near commercial or another contact to maintain the same time. Time zones tend to follow the borders between countries and their subdivisions rather than simply the following longitude.

The majority of time zones on land differ from Coordinated Universal Time (UTC) by a full hour (UTC$ - 12$ to UTC$ + 14$), but a few differ by $30$ or $45$ minutes. For most of the year, some countries in higher latitudes use daylight saving time, which involves shifting clocks by an hour. Many land time zones are offset from their corresponding nautical time zones to the west. The main advantage of having time zones is to keep the same clock time for the large parts of the earth.

Therefore the correct answer is option ‘C’.

Note: The Greenwich Meridian, also known as the Prime Meridian, the International Meridian, or $0^\circ $longitude, is the 'starting point' for separating the Earth's surface into time zones. Each time zone spans $15$ degrees of longitude (with local variations) and is one hour ahead of the zone to the east on the map.