A Circle is a two-dimensional figure whereas, a Sphere is a three-dimensional object. A circle has all points at the same distance from its centre along a plane, whereas in a sphere all the points are equidistant from the centre at any of the axes.
C
Calligraphy originated from China and Japan.
A is not 'decorative'.
B is not 'handwriting'.
D is not 'decorative'.
Which leaves C as the answer
That's a realistic sculpture<span />
was a German builder of keyboard instruments