Foragers Didn't Have the Same Problems We Do Today with Epidemic

Foragers didn't have the same problems we do today with epidemic let alone pandemic diseases in part because they

A) did not store harvested crops
B) socialized with those who worked on mercantile trade ships.
C) did not roam about their native lands
D) were frequently malnourished
E) lived in crowded quarters, where there were many people to act as reservoirs