Which Statement About Ozone Thinning Is True

Multiple Choice

Which statement about ozone thinning is true?

A) Ozone thinning is confined to the atmosphere over Antarctica.
B) Ozone levels fluctuate seasonally,with the lowest levels occurring in September and October.
C) Ozone thinning is irreversible since there are no substitutes for CFCs.
D) Ozone thinning was addressed by countries around the world at the 2010 Montreal Accords.
E) Ozone thinning only affects organisms living in polar regions.