3 & 4 is the answer to your question.
I believe it was to spread Islam.
Because they can get water as well as ship goods in and out. also it helps to grow crops and build homes around a stable community <span />
Answer:
Option A or C
Explanation:
Among the four options given, the first and third options are correct, infact they are identical also.
The era between 1920 and 1930 is considered as the biggest downfall of economy in the industrial world and this period was called as The Great Depression.
Due to the economic crisis, investment stopped and people stopped spending, when industries had nothing to sell, they laid off huge amount of workers
