Which Is True of the Amount of CO₂ in Our

Multiple Choice

Which is true of the amount of CO₂ in our atmosphere?

A) the level of CO₂ is currently more than 386 ppm.
B) the level of CO₂ has been increasing at the rate of 0.001% per year since 2000.
C) the level of CO₂ increased at the rate of 111.1% per year from 1990 to 1999.
D) the level of CO₂ is lower than at any time in the past 800 000 years.
E) the level of CO₂ is currently less than 386 ppm.