The answer is B, a team of explorers are studying the ocean floor
Answer:
much of Northern Canada has a subarctic climate
Explanation:
Canada's Arctic Climate region can be found in the far north of the country close to the Arctic Ocean. The climate pattern is characterized by long, cold and very harsh winters, lasting ten months or slightly more, and short, cool summers, spanning one to no more than three months.
The verb is past participle so that would be option A.