16. The following calculation that equals 9 is ( )
A. $3 \times 3 \div 3+3$
B. $3 \div 3+3 \times 3$
C. $3 \times 3-3+3$
D. $3 \div 3+3 \div 3$
【Solution】Solution: $A 、 3 \times 3 \div 3+3$
$$
\begin{array}{l}
=3+3 \\
=6 ;
\end{array}
$$
$$
\begin{array}{l}
\text { B. } 3 \div 3+3 \times 3 \\
=1+9 \\
=10
\end{array}
$$
$$
\begin{array}{l}
\text { C. } 3 \times 3-3+3 \\
=9-3+3 \\
=9 ;
\end{array}
$$
$$
\begin{array}{l}
\text { D. } 3 \div 3+3 \div 3 \\
=1+1 \\
=2 ;
\end{array}
$$

Therefore, the correct choice is: $C$.