In Optimal Allocation Sampling, the Necessary Sample Size of Each

In optimal allocation sampling, the necessary sample size of each stratum is determined based:

A) on the relative size of the stratum as well as the variability within the stratum.
B) solely on the stratum's size relative to a defined target population.
C) solely on the stratum's relative importance to a study.
D) on the number of homogenous strata identified in a defined target population.
E) on the number of heterogeneous strata identified in a defined target population.