Which nation stayed the biggest after the soviet union

Russia

Explanation:

It expanded into the third largest empire in the world by the 1700s, and as the post-revolution Russian Soviet Federative Socialist Republic, it was the largest part of the Soviet Union. With the break-up of the Soviet Union, Russia, also known as the Russian Federation, was officially established on December 25, 1991.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

trade in silk, spices, and precious metals.

answer first choice