What important change in the atmosphere occurred during the Proterozoic Eon? A. Helium escaped into space and hydrogen was bound into water molecules
B. Nitrogen and carbon dioxide levels decreased, fueling bacteria growth
C. Carbon dioxide levels increased, causing glaciation that cooled the planet
D. Methane levels decreased and oxygen levels increased, promoting aerobic life forms

i sometimes feel that way too. i feel that i should hurt someone because they hurt me, but i wouldnt do it. that would make things so much worse i have so much experience with this stuff

explanation:

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.