Michigan was one of the most important states in the development of the American automotive industry. Starting in the turn of the century, it was host to some of the first major automobile factories, including Ford and Olds (which made Oldsmobiles). This created great wealth and opportunity in the state, attracting people from around the country and many immigrants from foreign nations. This made cities like Detroit a melting pot.
Michigan further established itself at an industrial powerhouse during WWII, when its industrial capacity was used to support the war effort. During this time, FDR pushed legislation that legalized unions, which led to the unionization of many industry-based jobs and established an almost 100% tendency in Michigan to vote democrat, which has continued to this day (excluding the 2016 election).
The heavy industrialization in Michigan also set it up for some rough decades in the 1970s and beyond, when international competition caused many to lose their automotive and other manufacturing jobs. This has actually set Michigan up for a very difficult situation, with cities like Detroit losing many thousands of jobs over the years and becoming a shell of what they were.
Answer: D. Both populations developed techniques that allowed them to alter their environments to suit their needs.
In the 15th century, the populations of Europe and America were not in contact. In fact, for most of the century, they were not even aware of each other's existence.
Nevertheless, despite such separate development paths, there were some commonalities between all cultures. For example, the fact that they had all learned to use their environment to their advantage.
An example of that in North America is the case of the people of Central Mexico. They were able to learn how to farm on water, as their city was in the middle of a lake with very little land. In the case of Europe, developments such as the water mills used the natural resources people had to their advantage, and as a consequence altered their natural environment.