Consider the supply of crude oil on the world market. in august 2011, the price of oil was roughly $80 per barrel. which of the following changes would increase the supply of oil? the oil supply curve would shift to the right if the prices of other petroleum-based products (substitutes) were to increase. the number of oil-producing countries were to decrease. the cost of transporting oil were to increase. future oil prices were expected to be lower. the world price of oil were to increase.

As a result of a labeling mistake at the chemical factory, a farmer accidentally sprays weedkiller rather than fertilizer on half her land. as a result, she loses half of her productive farmland. if the property of diminishing returns applies to all factors of production, she should expect to seea. a decrease in the marginal productivity of her remaining land and an increase in the marginal productivity of her labor. b. an increase in the marginal productivity of her remaining land and an increase in the marginal productivity of her labor. c. an increase in the marginal productivity of her remaining land and a decrease in the marginal productivity of her labor. d. a decrease in the marginal productivity of her remaining land and a decrease in the marginal productivity of her labor.