Which one of the following shows a good example of rhythm used in a room's decor?
a. an oval coffee table in front of an l-shaped sofa
b. a rectangular red area rug, oval-backed dining chairs, and a blue dining table c. a dark-blue print pillow on a white sofa and a light-green, solid-colored pillow on a wooden chair
d. an arched line at the tops of dining room chairs repeated in a sofa back, a mirror top, and a window's drapery line