That will depend on which course you're talking about. It will be a minor role in, say, Maritime Law or Comparitive Religion, but a major one in, say, Particle Physics or Linear Algebra.
I remember c/d. That's not a problem. But if you want 'c', you'll have to give me 'd'.
Answer:
Norway, Sweden, Finland and Iceland
Explanation:
Sea ice is a frozen seawater that floats on the ocean surface. It is formed between the Antarctic and Arctic hemisphere. It disappears in summer but not completely. The countries that experienced sea ice in 1986 were eight (8) in number but the countries bordered by open water were in September 2017 were Norway, Iceland, Finland and Russia.
b. describes it best because a form of molten cools down and makes igneous rock. Good luck! Please mark me brainliest!