3. Who are the members of the G20?*
O
a. The 20 wealthiest nations
b. The 20 most dangerous nations
O
c. The 20 newest nations
O
d. The 20 oldest nations

The US, Russia, and China remain the planet's most powerful countries even as other countries have seen their positions fall, according to this year's global power rankings.

The rankings, published by US News and World Report, look at how the influence of a nation, as well as its political, economic, and military power. The rankings are part of its annual "Best Countries" study, which evaluates 80 countries based on responses from 21,000 people.  

These are the world's 25 most powerful nations, according to the 2020 rankings:

Explanation: