3. In a closed economy with lump sum taxes, if the marginal propensity to consume increased from 0.5 to 0.75, the simple spending multiplier and the marginal propensity to save (MPS) would change in which of the following ways? Multiplier. MPS A. increase. increase
B. increase. decrease
C. no change. decrease
D. decrease. decrease​

The roman empire fell around the 5th century, and as islam spread in the 7th century, trade between europe and china slowed. chinese traders were blocked from westward expansion into europe when the chinese army was defeated by muslim fighters in the area known as syr darya. the trade routes, known as the silk road, fell into disuse, and trade between the far east and europe nearly stopped. it wasn't until the 13th century when the mongols invaded and controlled central asia and large parts of the middle east that extensive trade along these routes was opened again. based upon the paragraph above and your knowledge of the mongols, which of the following statements is correct? a. the mongols unified regions along the silk road, allowing for safe transport of goods. b. muslims controlled busy trade routes into china from the 5th to the 7th centuries. c. without access to european markets, the chinese were unable to obtain raw materials. d. the mongols replaced the roman empire as the dominant force in western europe.

4. when a child cries out during rough play, the caregiver should a. encourage the distressed child to fight back. b. respond immediately, since the behavior has changed to fighting. c. ignore it, because rough play is a natural part of children’s learning. d. ignore the request for unless there has been an injury. i need answer

The sociological perspective focuses on what? a. general social patterns b. individual behaviors c. biological explanations d. mental processes