help on 9 and 10 please, thanks.

Question 9 Cornplete 0.00 points out of 1.00 F Flap question Environmental accounting implies that development would be sustainable if a. The manufactured capital asset remains constant or rises over time. b. Natural resources are not affected by production process. c. Natural resources and other forms of capital are substitutes. d. The overall capital assets (including manufactured capital, human capital and environmental capital) do not decrease over time. Ouestion 10 Compient o. 00 points out of 1.00 F flog qumbon Tragedy of the common occurs when a. The negative externalities among workers are internalized through the privatization of the resources or government rogulations. b. A resource is non-rival in consumption but excludable. c. Each additional worker who joins those cultivating commonly held land neglect the negative externalities on others. d. There is an overconsumption of a public good