According to the passage, the actions that would have been illegal in the late 1600s are as follows:
A. A farmer in Georgia trading food goods with a shipbuilder in Massachusetts would be legal, as it involves intra-colony trade.
B. A merchant in the Maryland Colony unloading fur from a Spanish ship in exchange for corn would be illegal, because goods from a European country (in this case, Spain) had to be brought into England in British ships, and trading directly with a foreign ship was prohibited.
C. A trader in London purchasing wine directly off of a ship from the southern coast of France would also be illegal, as the importation of goods from any European country had to be done in British ships.
Therefore, the answer is B. A merchant in the Maryland Colony unloads fur from a Spanish ship in exchange for corn.