The US Global Change Research Program Examined Data for Evidence of of Global

Multiple Choice

The U.S. Global Change Research Program examined data for evidence of global climate change. The following graph shows the average yearly ground temperature at a depth of 65.5 feet (the typical measure of permafrost, indicative of ground frozen solid) between 1978 and 2008 in Deadhorse, a town in northern Alaska.
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Which of the following statements about the data is TRUE?

A) There is a clear upward trend but no cyclical pattern.
B) There is a clear cyclical pattern but no trend.
C) There is a clear upward trend as well as a clear cyclical pattern.
D) There is neither a clear trend nor a cyclical pattern.