Two Independent Samples Are Drawn from Two Normal Populations, Where

Two independent samples are drawn from two normal populations, where the population variances are assumed to be equal. The sampling distribution of the ratio of the two sample variances is: $\begin{array}{|l|l|}\hline \text { A. } & \text { a normal distribution. } \\\hline \text { B. } & \text { Student } t \text {-distribution. } \\\hline \text { C. } & \text { an } F \text {-distribution. } \\\hline \text { D. } & \text { a chi-squared distribution. } \\\hline\end{array}$