{All states west of the Rocky Mountains} {All states west of the

Atlantic Ocean}

I have make a true statement out of the question above, so I have to figure out if the twostatements are a

Proper Subset

is a subset of

is not a subset of

proper subset and is a subset of

The first answer I selected for the question was proper subset and is

a subset of, but obviously the answer was wrong when I done the problem as practice. I think the answer may be is not a subset of, but I am not sure.

Thanks for any help on this.