People Are More Likely to Perceive This Configuration of Shapes

Multiple Choice

People are more likely to perceive this configuration of shapes: $$\begin{array} { c c c c } \Delta & \Delta & \Delta & \Delta \\\diamond & \diamond & \diamond & \diamond \\\$ & \$ & \$ & \$ \\\cdot & \cdot & \cdot & \cdot\end{array}$$
As four rows rather than as four columns. Which one of the following Gestaltist concepts best accounts for this phenomenon?

A) Closure
B) Prägnanz
C) Proximity
D) Similarity