Where among the following was the ozone hole first discovered?

The ozone hole was first detected over the South polar region above Antarctica.

British scientists reported the sharp springtime thinning there in the mid-1980s.

The North polar region shows ozone loss too, but it was not the first place discovered.

The Mediterranean region lies in mid-latitudes and never developed a true ozone hole.

The tropical region receives strong sunlight but does not form the seasonal hole.

The extreme cold of Antarctic stratospheric clouds speeds the ozone-destroying reactions.