The Gates of the Great Stupa at Sanchi (Figure 18

The gates of the Great Stupa at Sanchi (figure 18.9) feature a tree, footprints, and an umbrella, because these items:

A) Showed that the Buddha's preaching reached out in all directions
B) Depicted the Buddha without using a human form
C) Helped Buddhists appeal to those who looked to the old ways
D) Made the relief decorative