Read the excerpt from "Climate Change: An Overview." What chronology is described in this excerpt?
By the early twentieth century, carbon emissions from
fossil-fuel burning reached 1 billion tons a year,
Automobiles, airplanes, and domestic and agricultural
energy demands all contributed to the rising trend. In the
1950s, scientists used a new generation of equipment to
confirm that carbon dioxide concentrations were
doubling and that this would have the effect of increased
temperatures
the increase in automobile usage from the early
twentieth century through the 1950s
O the changes in carbon dioxide emissions from the
early twentieth century through the 1950s
o the development of new technologies from the early
twentieth century through the 1950s
O the changes in popular modes of transportation from
the early twentieth century through the 1950s