What type of garbage can you throw overboard on inland waters?

Which type of evidence would support the author's claim?

Which statement is a good description of a model? a) models are a description of nature based only on one or two variables. b) models are testable ideas but they are not very to most people. c) models are a description of nature that predicts more accurately than real events. d) models are an approximiation of a real system that omits all but most essential variables in a system.

This was an act of continental congress which initially organized the first united states territory and was to be the basis for governing how the united states would expand westward.