Which french scientist developed a method that used heat to kill harmful microbes that cause milk and other food products to spoil?
a. aristide boucicaut
b. louis pasteur
c. sigmund freud
d. samuel gompers

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).