How, in General, Is the Requirement of Equal Population Variances

How, in general, is the requirement of equal population variances to allow the use of analysis of variance method verified?

A) The largest sample standard deviation is equal to the sum of the other standard deviations.
B) The largest sample standard deviation is less than or equal to the variance of the smallest sample.
C) The largest sample standard deviation must be less than or equal to twice the smallest sample standard deviation.
D) All three sample standard deviations must be equal.

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