Which of the Following Is the Correct Sample Size Requirement

Which of the following is the correct sample size requirement for the Wilcoxon signed rank sum test statistic to be approximately normally distributed? $\begin{array}{|l|l|}\hline \text { A. } & \text { Sample sizes less than 10 .} \\\hline \text { B. } & \text { Sample sizes greater than 30 .} \\\hline \text { C. } & \text { Sample sizes greater than 5 .} \\\hline \text { D. } & \text {Sample sizes greater than 100 . } \\\hline\end{array}$