In comparing the two variances below, what is the test value and what are the degrees of freedom that should be used? 
A) test value = 0.45, degrees of freedom = 19 and 29
B) test value = 0.45, degrees of freedom = 18 and 28
C) test value = 2.20, degrees of freedom = 28 and 18
D) test value = 2.20, degrees of freedom = 29 and 19
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