Answer:
1. rapid spread of disease 2. overpopulation 3 starvation
Explanation:
disease would spread really quick and would be a major problem for every city like Rome for example 2 overpopulation would have lots of people crammed into one building and poverty 3 starvation would be a major thing like in Rome since it was forced to import its food to supply the population many people would be dieing of starvation when those lines would be cut off
