Which statement about the economics of ecosystem services has been found to be historically accurate? Group of answer choices
a. Ecosystem services such as lumber and meat are protected by the relative operating time scales of economics and ecological systems.
b. Free market approaches avoid the problem of the tragedy of the commons, as everyone must pay for the goods and services that they use.
c. Supply and demand principles indicate that free markets are optimal for conserving scarce resources.
d. Markets intrinsically account for all of the important aspects of a commodity or services and are thus able to attach environmentally realistic prices on all environmentally derived goods.
e. Conventional markets require intervention in order to conserve and protect important environmental services.
f. All of these