Study the graph of average temperatures recorded at monitoring stations in December throughout the United States. A line graph titled Contiguous U S Average Temperature in December. The x-axis is labeled in years 1950 to 2015. The y-axis is labeled Temperature from 25 to 40 degrees Fahrenheit. A yellow line marks 1901 to 2000 mean of 32.68 degrees Fahrenheit. The straight line is average temperature. the lowest temperature is between 1980 and 1985. The highest temperature is in 2015.

What conclusions can be drawn from the graph? Select two options.

The coldest year since 1950 was 1983.
The hottest year since 1950 was 1957.
Most years since 1990 have been hotter than the 20th-century average.
Most years from 1950 to 1960 were colder than the 20th-century average.
Temperatures varied farther from the average in the 1990s than the 1980s.