Which Is the Most Correct Statement? the Required Sample Size,n,is

Multiple Choice

Which is the most correct statement? The required sample size,n,is a function of:

A) The variability in the population,precision or accuracy needed,confidence level desired,and type of sampling plan used.
B) Precision or accuracy needed,confidence level desired,and type of sampling plan used.
C) The variability in the population,precision or accuracy needed,and confidence level desired.
D) The variability in the population,precision or accuracy needed,and type of sampling plan used.