[tex]\huge\text{Hey there!}[/tex]
[tex]\mathsf{\sqrt{36}}\\\\\mathsf{= \sqrt{6^2}}\\\\\mathsf{= \sqrt{6\times6}}\\\\\mathsf{= \sqrt{36}}\\\\\\\\\huge\text{Therefore, your answer should be: \boxed{\mathsf{Option\ C. \ 6}}}\huge\checkmark\\\\\\\\\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]