During which eon did oxygen begin to build up the most in Earth’s atmosphere?
A) Proterozoic
B) Archean
C) Hadean
D) Phanerozoic

I’m annoyed but glad that my history teacher left and quit her job as a teacher to become a flight attendant

What was the first civilization name of the indians?

Which goal was most likely to be supported by both poor peasents and city merchants in the early years of the french revolution? an end to feudal privileges overthrow of the monarchy destruction of the power of the catholic church suppression of the third estate take your time to answer, i'm not in a big rush