Which of the following is the most complex of all ecosystems?

An alternative to the current primary system in the United States recommends that the nation vote in primaries in four blocks, starting with the 13 states with the smallest population, then the next 13, next 12, and largest 12 . This plan is known as the _________

a. Iowa Plan b. Ohio Plan– c. Delaware Plan d. Rotating Plan

One major challenge that is yet to be resolved and continues in California is

a. Establishing a state-wide minimum wage law b. Pollution in solar panels c. Huge gaps between the rich and the poor d. Oranges freezing in cold temperatures