Which of the following statements regarding methane as a greenhouse gas are correct?

A) Methane absorbs infrared radiation at a different wavelength than carbon dioxide
B) The wavelength at which methane absorbs radiation makes it a potent greenhouse gas
C) The concentration of methane in the atmosphere is greater than carbon dioxide, which is why global temperatures have risen so drastically over the last 100 years
D) Methane acts as a catalyst to produce ground-level ozone