part:a which statement describes the central idea of the text? a. it is common for volcanoes to hide underneath ice sheets, and they usually remain inactive due to the weight of the ice. b. if the volcanoes under the west antarctic ice sheet erupted, it would be because humans thinned the ice sheet. c. while the volcanoes under the west antarctic ice sheet appear to be active, they are buried to deep to have an effect if they erupt. d, the activity of the volcanoes underneath the west antarctic ice sheet will affect the ice sheet as a whole, but the exact impacts are unknown.