What problems did builders encounter when constructing the panama canal?

Explanation:

The major problems the builders encountered was 1) disease (Malaria, yellow fever, cholera), 2) Massive rainfall and 3) Transportation.

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).

hi, according to my research the answer to the first question would be false. al tabari was the author of the first medical encyclopedia & he was a persian scholar not arab