( PLEASE HELP ) In the early 1990s, the U. S. model of a free and democratic society helped inspire countries like Estonia, Latvia, and Lithuania to do which of the following?

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste