Which of the following are characteristic of alphanumeric outlines?

I. capitalized letters

II. Roman numerals

III. Arabic numerals

a. I only
b. II only
c. II and III
d. I, II, and III

The characteristic of the alphanumeric outline includes: (I) capitalized letters, (II) Roman numerals, and (III) Arabic numerals. Hence, the answer is letter D. The first item used for the categorization is the Roman numerals numbering followed by the use of the capital letters below each Roman numeral. Then, lastly the use of the Arabic numeral under each capitalized letter.