Which sentence from an inconvenient truth would be best supported by the graph?
a. “in the pre-industrial world, just the right amount of the sun’s energy was soaked up by the greenhouse gases in the atmosphere”

b. “it’s as if the entire earth takes a big breath in and out once a year.”

c. “as a result, the temperature of the earth’s atmosphere and oceans is getting dangerously warmer.”

d. “the heat stored in the earth can produce electricity.”