WHICH SENTENCE BEST DESCRIBES THE MAIN IDEA OFBEST WAY TO COMBINE...

32. Which sentence best describes the main idea ofbest way to combine sentences 12 and 13?the essay?(12)As glaciers moved over the land, their weighta.sentence 1expended enormous force on the mountains.b.sentence 2(13)The mountains sank into the sea.c. sentence 9a.The weight of the glaciers was expending and.sentence 11enormous force on the mountains as it movede. sentence 16over the land, causing the mountains to sink