The Reason Canada Can Exploit Oil Sand Profitably While Most

The reason Canada can exploit oil sand profitably while most other countries cannot is that:

A) Canadian technology for extracting petroleum products from oil sand is the best in the world.
B) Canadian oil sand deposits are very near the surface of the Earth, making mining less expensive.
C) Canadian oil sand contains bitumen rather than kerogen.
D) the price of labor in Canada is well below that of other countries.