The answer to that question i believe is d
Answer:
During World War One, there were many technological and scientific advances. The advances were much needed at the time, and changed the nature of warfare, which includes tactics used and their strategy. Scientists and invented worked very hard during the War so that they would have the upper hand during war. These weapons greatly improved efficiency, self-defense, and their warfare.
Hope this helps
The passages through the Mediterranean for reaching the Indian Ocean were occupied by the Arabs, and they were requesting large amounts of money or goods for passing through, and also the waters were very insecure because of the pirates. So Portugal was trying to find a way around Africa to reach the Indian Ocean and thus India, so that it can continue with trade of the goods from the Asian continent and keep its wealth and power on the global scene.
