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What is the main idea of this text?

A- In the debate on the cause of the rise in global temperature, evidence
suggests that greenhouse gases are the cause
of global warming.

B- In the debate on the cause of the rise in global temperature, evidence
suggests that greenhouse gases are not the cause of global warming.

C -In the debate on the cause of the rise in global temperature, evidence
suggests that the sun is the cause of global warming.

D- In the debate on the cause of the rise in global temperature, evidence
suggests that the sun is not the cause of global warming.