Answer:
Darwin had arrived at a complete theory of evolution by 1839, but it was to be another 20 years before he published his ideas of evolution through natural selection in his epochal book On the Origin of Species by Means of Natural Selection.
that would be waste exchange
You will observe the the project that your trying to do an watch the change
1.94 * 6. 01 = 11.7 which is approximately same as 11 700. So the answer is 3).
