New scientific knowledge help the building of the Panama canal because there was a decrease of workers getting sick of malaria and yellow fever. It was Colonel Gorgas, the Chief Medical Officer, who have read about discoveries linking mosquitoes and malaria. Due to these readings, he succeed in eradicating the cause of the disease therefore a decrease in people getting sick.
They were folloing heards of food during the Ice Age, so the answer is C.
Answer:
The post-traumatic disorder that soldiers acquired prevented them from achieving a normal life because the slightest stimulus could lead them to terrible memories about the crash causing collapses and nervous crises at any time.
Explanation:
The post-traumatic upheaval that the ex-soldiers who fought in the first world war acquired prevented them from being able to return to a normal life due to the constant breakdowns that the simplest of social elements caused in them. The traumas they went through during the war, made them see flashbacks that caused strong paranoia and prevented them from living in a family, social and even professional environment, as they had terrifying nervous crises and that left them completely out of their minds.
