(mc)which of the following presented the biggest obstacle to the workers who built the panama canal?

The one that presented the biggest obstacle to the workers who built the panama Canal is : Mosquitoes and Tropical diseases.

Back then, we still haven't developed an efficient method to deal with Malaria. A lot of workers that worked to built panama Canal got infected with Malaria and slowed down the Canal's develpment

hope this helps

Lol sorry i didnt answer ur question. but, did u know u can get ez points by typing random stuff : 3