Submarines are highly efficient War machine. It is easy to attack the enemies and can hide easily.
<u>Explanation:</u>
20 to 30 sailors on submarines can cause more damage than 1000 soldiers on the battlefield. Usually, Submarines operate during the night. Germans mostly used advanced submarines which led them to attack US submarines effectively.
They called submarines as U-boats means underwater boats. submarines usually travel on the surface of the water and can go downwards to a limited extent. Submarines use a diesel engine for high surface speed and for long travel.
I think it's B :) The others don't make much sense to me
More job opportunities (factories/industries)
Urbanization
worked for minimum wages
The Great Plague transformed Europe because it caused people to be very cautious not to catch the deadly disease and later on, it killed thousands of people which made some people feel lucky to be alive. This also has made an impact on history because this is such an important time that we hear about and we find it very interesting that a sickness could have killed thousands.
Hope this helps!!!:)
