If The $U$ Test Is Applied in a Test Whose Alternative Hypothesis Is

Multiple Choice

If the $U$ test is applied in a test whose alternative hypothesis is $\mu_{1} \neq \mu_{2}$ with $n_{1}=7, n_{2}=7, \alpha=0.05$ , the null hypothesis can be rejected if

A) $W_{1} \geq 70$ and $W_{2} \geq 70$ .
B) $\mathrm{U} \leq 8$ .
C) $\mathrm{U}>8$ .
D) $\mathrm{W}_{1} \leq 70$ or $\mathrm{W}_{2} \leq 70$ .