3. which of the following factors is most likely to contribute to year round precipitation found along
the east coast of the u. s.?
a) the ct air mass.
b) cold oceanic currents.
c) the polar high
d) semi-permanent high pressure system.

d)

Explanation:

A semi-permanent high pressure system like the Bermuda High can have a very notable effect on the precipitation values along the eastern seaboard of the United States. In order for the Bermuda High to facilitate the arrival of warm moist air from the Gulf of Mexico over the eastern United States, the high pressure system needs to be stationed over the Atlantic Ocean and not directly over the eastern part of the United States.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker