Choose the word or phrase among A, B, C or D that best fits the blank space in the following passages
                                                                          Maple Tree
Trees have..........................a meaningful role in the...........................development of Canada and continue to be of commercial, environmental an aesthetic importanceto all Canadians. Maples contribute valuable wood products, keep the maple sugar.....................alive and help to beautify the landscape.
Since 1965 the maple leaf..................the most important feature of the Nation Flag of Canada and the maple tree with the leaves has become the most well-known Canadian.................., nationally and internationally. Maple leaf and badges are proudly...............by Canadians abroad, and are recognized around are the world...................the maple leaf is closely associated with Canada, the maple tree was never officially recognized..................... Canada's emblem until 1996.