How did the death rate of the Chesapeake colonies affect the population?

A. While there was a high infant mortality rate, there was a low adult mortality rate.
B. The society suffered a continual loss of knowledge and experience since many skills could not be passed on and had to be relearned.
C. Hardly any immigrants chose to move to the region for fear of contracting deadly diseases.
D. The middle class became more cemented because there was a greater need for educated doctors.