At which COP were countries first required to extend their commitment period

The Kyoto Protocol, a landmark environmental treaty that was adopted in 1997 at the COP 3 in Japan, represents the first time nations agreed to legally mandated, country-specific emissions reduction targets.

Explanation:

https://en.m.wikipedia.org/wiki/Kyoto_Protocol

the article where I got the info from, hope this helps

i think it's c

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .