help with these three please

The marginal utility line will_ _ as a consumer buys more of a good. Select one: a. Continuously decline if diminishing returns are present. b. Follow the same shape as the total utility line. O c. Increase steadily and then decline. d. Increase as more goods are consumed. The following describes an outcome when public goods were marketed like private goods Select one: a. People would wait for others to pay. b. Market failure would not occur. c. Society would be closer to achieving the optimal mix of output. d. Public goods would be efficiently produced. During economic failures the government is supposed to Select one: a. Push market outcomes closer to the ideal. b. Create an alternative to markets. O c. Eliminate markets. d. Do nothing. D