State the Proper Forms of Hypotheses for Two-Sample Hypothesis Tests

State the proper forms of hypotheses for two-sample hypothesis tests.
-Which of the following Excel tools is used for a two-sample test for equality of variances?

A) Excel F-test Two-sample for variances
B) Excel z-test: Two-sample for means
C) Excel t-test: Two-sample assuming unequal variances
D) Excel t-test: Two-sample assuming equal variances