The figure shows the lengths of each of the four sides of a quadrilateral. What is the perimeter of the figure?
A. 12x - 21
B. 9x - 21
C. 12x - 1
D. 9x - 1
![The figure shows the lengths of each of the four sides of a quadrilateral What is the perimeter of the figure A 12x 21 B 9x 21 C 12x 1 D 9x 1 class=](https://us-static.z-dn.net/files/d92/12999360d3afa20ddfa301c633025321.png)