Which of the Following Are Statistical Methods That Require Few

Short Answer

Which of the following are statistical methods that require few assumptions, if any, about the distribution of the population? $\begin{array}{|l|l|}\hline A&\text {Parametric techniques. }\\\hline B&\text {Inferential statistics }\\\hline C&\text {Non-parametric techniques. }\\\hline D&\text {All of these choices are correct. }\\\hline \end{array}$