[tex]D)\text{ d}[/tex]
Explanation
let's remember some properties of the exponents and radicals
[tex]\begin{gathered} a^{\frac{1}{m}}=\sqrt[m]{a} \\ a^{\frac{n}{m}}=\sqrt[m]{a^n} \\ a^m*a^n=a^{m+n} \end{gathered}[/tex]
so
Step 1
given
[tex]\sqrt{d^2}[/tex]
hence, let's apply the rule
[tex]\sqrt{d^2}=d^{\frac{2}{2}}=d^1=d[/tex]
therefore,the answer is
[tex]D)\text{ d}[/tex]
I hope this helps you
