What Is the Difference Between a Serif Font and a Sans

Multiple Choice

What is the difference between a serif font and a sans serif font?

A) A serif font is larger in size than a sans serif font.
B) A serif font is copyright protected, while a sans serif font is open source.
C) Serif fonts are script, while sans serif fonts are block.
D) Serif fonts have small tips at the ends of the main strokes in each letter, while sans serifs do not.