Which phrase correctly completes this sentence? both the united states and canada have a. thick forests, grassy plains, oil fields, and coal b. thick forests, grassy plains, tundra, and deserts c. grassy plains, tundra, and tropical grasslands d. tropical grasslands, deserts, fresh water lakes, and oil fields

This one is tough but I'll go with C. I don't think Canada has any desserts since it's cold up there, so B and D are out. A doesn't state Tundra and both Canada and America have Tundra. America has Colorado, Montana, Wyoming, and Alaska as Tundra states. C has all 3. Canada may have tropical grasslands considering it is almost exactly in the northern hemisphere surrounded by water. Florida has tropical grasslands too. And of course both countries have grassy plains.

i think the answer is b.