Answer is Europe environmental solutions must be confined by political borders
Glaciers shaped the landscape is the answer. Actually, in Nova Scotia near Halifax there is a glacial boulder or erratic of basalt which is deemed to come from about 130km away perhaps from the north or NW. Also, there are glacial striations there on the bedrock which can be used to determine the sense of the direction of flow of the ice. In New England, there are pro-glacial lakes. Both the Maritimes and New England were most likely covered by the Laurentide continental glaciation.
I'm thinking A. Because uniformitarianism means the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.