Geometry

The answer is C. A point has no dimensions.

Analyze each option:

A. A point has length and width: In geometry, a point is a dimensionless entity. Shapes with length and width are two - dimensional figures like rectangles, not points. So this option is incorrect.

B. A point has length but no width: A point does not possess any length. Lines can be associated with length, but not points. So this option is incorrect.