Sylvia is somewhat dissatisfied with her friendship with sarah, in part because sarah has been depressed a lot lately and isn't as much fun to be around any more. sylvia maintains her friendship with sarah in spite of these reservations, in part because she feels that over the years she has known sarah, sarah has been there when sylvia needed her and they have a lot of history together. according to social exchange theory, which of the following best explains why sylvia continues to be friends with sarah?
a forecasted rewards b cumulative rewards c immediate rewards d expected rewards

1. why is the soil in the mississippi alluvial plain generally better than the soil in the ozark mountains? a. farmers in the mississippi alluvial plane can afford better fertilizers. b. the soil is rich because of all the animals that died in and around the mississippi river millions of years ago. c. rivers such as the mississippi carry nutrient-rich silt that is spread around the area when the river floods d. the glaciers that flattened the ozarks took the topsoil with them as they receded. 2. people who live in the region of arkansas are likely to experience a damaging earthquake? a. mississippi alluvial plain b. arkansas river valley c.quachita mountains d. gulf coastal plain 3.what caused the great flood of 1927 to be so devastating? (select all that apply.) a. the river flooded quickly overnight leaving little warning to the people living nearby b. early warm weather in canada cause snow to melt c. levees hadn’t been built along the rivers yet d. too many dams have been bill along the mississippi river and it’s tributaries. e. the spring of 1927 so record amounts of rainfall in the midwest f. floodwaters covered parts of the state and up to 30 feet of water.