1. How have the temperatures after 1975 compared with the temperatures before 1935?
All temperatures before 1935 were higher than average, while all temperatures after 1975 were lower than average.
All temperatures after 1975 were higher than average, while all temperatures before 1935 were lower than average.
All temperatures before 1935 were average, while the temperatures after 1975 alternated between above and below average.
Some temperatures after 1975 were higher than average, while all temperatures before 1935 were higher than average.