Which of These Is a Good Combination of Type Sizes

Multiple Choice

Which of these is a good combination of type sizes for a typical printed business document?

A) 8 points for regular text; 32 points for headings
B) 6 points for regular text; 32 points for headings
C) 18 points for regular text; 12 points for headings
D) 72 points per inch for regular text; 36 points per inch for headings
E) 10 points for regular text; 18 points for headings