Welp they both had two great oceans between them, a land invasion is near Impossible, and a sea attack would not be smart for the Central Powers/Axis
An Air attack needs refueling and no enemy had a close airbase plus we had anti air any attack on North America or any of the Americas is useless.
If you look on openstudy.com they have lots of answers to this :-)
The answer is 41 because if something is reflected it stays the same. And B’ C’ is 41 so B C is 41 units as well
Its demonstrated OK but I didn’t use enough visuals like in the participation part rain will probably help and you forgot to add an arrow between condensation precipitation.