English settlers main hope was to gain land in the new world that they could use for farming. This would enable them to make money from selling crops. They would then pass the land to their sons keeping the family prosperous.
There were other settlers that left to escape persecution (mostly religious persecution).
It was primarily "d. wealthy merchant families such as the Medici and popes such as Julius II" who paid the great artists and architects of the Renaissance to create their masterpieces, since they had money to spare.
The main reason was to find more land.
Sociology is a science every bit as much as biology or chemistry. Social sciences, like natural and biological sciences, use a vigorous methodology. This means that a social scientist clearly states the problems he or she is interested in and clearly spells out how he or she arrives at their conclusions. Generally, social scientistsground the procedure in a body of existing literature. This is precisely how other sciences function.
So, sociology is a science which attempts the interpretive understanding of social action in order thereby to arrive at a causal explanation of its course and effects.