How is the Roman Republic compared with the Roman Empire?

Rome was a small city state in the 6th century and was governed by kings. However, after only 7 kings had ruled, and despite the small population size of Rome, the city managed to overthrow the monarchy and create a republican government that was supposedly supposed to represent the wishes of the Roman citizens. In order to rule the city a senate was developed, and this council was put in place to rule over Rome. Once Rome became a republic it grew in strength and went on to conquer swathes of the Mediterranean.  The Roman republic was very successful, and continued for five centuries.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

hope this ! : )