Whenever the Null Hypothesis Is Not Rejected

Short Answer

Whenever the null hypothesis is not rejected: $\begin{array}{|l|l|}\hline A.&\text {the null hypothesis is true. }\\\hline B.&\text { the alternative hypothesis is false.}\\\hline C.&\text { the null hypothesis is maintained.}\\\hline D.&\text {the null hypothesis is accepted. }\\\hline \end{array}$