Indicate which of the following statements is NOT true about vector graphics.

A$.$ Vector graphics are defined by mathematical shapes and curves.

B$.$ Vector graphics are clear for images that contain up to $8$ colour shades, and blurry in images with higher numbers of colour shades.

C$.$ Vector graphic files usually have a smaller file size than the same image stored as a bitmap.

D$.$ Vector graphics can be made at any size and later enlarged or shrunk as needed without loss of quality.