What kind of test is being used for the following hypothesis and what would a z-statistic of 1.68 tell us about a hypothesis with the appropriate test and a level of significance of 5%, respectively?
H0: B ≤ 0 HA: B > 0
A) One-tailed test; fail to reject the null. B) One-tailed test; reject the null. C) Two-tailed test; fail to reject the null.