As an Independent Project, a Team of Statistics Students Tabulated $\text { MrN Location }$

As an independent project, a team of statistics students tabulated the types of vehicles that were parked in four different suburban shopping malls.                          $\text { MrN Location }$
$\begin{array}{|c|c|c|c|c|c|}\hline\text { Vehicle Type }& \text { Somerset } & \text { Oakland } & \text { Great Lakes } & \text { Jamestown }&\text { Row Tolal }\\\hline \text { Car }&44 & 49 & 36 & 64&193 \\\hline \text {Minivan }&21 & 15 & 18 & 13 &67\\\hline \text { Full-size Van }&2 & 3 & 3 & 2 &10\\\hline \text { SUN }&19 & 27 & 26 & 12&84 \\\hline \text {Truck }&13 & 6 & 17 & 9 &46\\\hline \text { Col Total}&100 & 100 & 100 & 100 &400\\\hline\end{array}$ For a chi-square test of independence, degrees of freedom would be:

A) 20.
B) 12.
C) 399.
D) 6.