The F-Distribution Is the Sampling Distribution of the Ratio Of

The F-distribution is the sampling distribution of the ratio of: $\begin{array}{|l|l|}\hline \text { A. } & \text { two normal population variances. } \\\hline \text { B. } & \text { two normal population means. } \\\hline \text { C. } & \begin{array}{l}\text { two sample variances, provided that the samples are independently drawn from two } \\\text { normal populations. }\end{array} \\\hline \text { D. } & \text { two sample variances, provided that the sample sizes are large. } \\\hline\end{array}$