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Which of the following answer combinations BEST completes the sentence below?
Volcanic eruptions lead to _____________ average global temperatures because ________________.
cooler; eruption-generated gasses reflect heat from the sun
cooler; eruption-generated particulate matter block out solar radiation
warmer; eruptions add significant amounts of greenhouse gasses to the atmosphere
warmer; eruption-generated particulate matter help prevent heat loss
stable; volcanic eruptions are not known to have impacts on global temperatures