Statistics Canada Excludes from GDP the Value of Goods and Services

Statistics Canada excludes from GDP the value of goods and services exchanged "under the counter" because

A) these goods are all intermediate goods.
B) satisfactory methods for their measurement have not been developed.
C) these goods do not contribute to well- being.
D) Statistics Canada is responsible for making an ethical decision about which activities to exclude from national income measures.
E) their production has zero opportunity cost.