Choose the Item That Best Matches Each Item of the Following

Choose the item that best matches each item of the following:
-A relatively low, but constant, level of occurrence of a disease or condition in a population

A) Morbidity
B) Endemic
C) Epidemic
D) Pandemic
E) Validity
F) Index
G) Incidence
H) Epidemiology
I) Prevalence
J) Disease rates
K) Mortality
L) Causality
M) Etiology
N) Risk factors
O) Reliability
P) Surveillance