问题如下：
Which of the following statements about hypothesis testing is correct?
选项：
A.The null hypothesis is the condition a researcher hopes to support.
B.The alternative hypothesis is the proposition considered true without conclusive evidence to the contrary.
C.The alternative hypothesis exhausts all potential parameter values not accounted for by the null hypothesis.
解释：
C is correct.
Together, the null and alternative hypotheses account for all possible values of the parameter. Any possible values of the parameter not covered by the null must be covered by the alternative hypothesis (e.g., H0: θ ≤ 5 versus Ha: θ > 5).
老师，我们原本认为真的，不是应该放在备择假设中吗，跟原版书上这个段话有矛盾呀，那应该再怎么理解呀
