The Answer is The First one
“It Gave the Allies the advantage to win the war”
Both the origin of the Kievan state and that of the name Rus, which came to be applied to it, remain matters of debate among historians. According to the traditional account presented in The Russian Primary Chronicle, it was founded by the Viking Oleg, ruler ofNovgorod from about 879.
The correct option is:
B) Many workers were killed or sickened by malaria and yellow fever carried by mosquitoes.
When the United States gained control of the Panama Canal project (1904) the Isthmus of Panama was known for its tropical diseases. More than 22,000 deaths had occurred during the French effort to build a canal, especially due to yellow fever and malaria. It was later established that the poor living conditions of the workers included pools of standing water where mosquitoes were breeding and spreading disease.
