A stern sense of duty and of honor, a seldom absent sense of humor, endless energy, bold determination, sincere simplicity, and lasting sympathy and loyalty, are the important characteristics of the typical American—of Mr. Clemens.
A.
The key traits of a true American like Mr. Clemens are his faithfulness, wit, enthusiasm, sincerity, compassion, and dedication (Harkins 43).
B.
Mr. Clemens, a typical American, represented duty and honor, sense of humor, endless energy, bold determination, sincere simplicity, and lasting sympathy and loyalty (Harkins 43).
C.
Mr. Clemens was a typical American for his sense of duty and of honor, sense of humor, energy, determination, simplicity, and sympathy and loyalty (Harkins 43).

Question

A stern sense of duty and of honor, a seldom absent sense of humor, endless energy, bold determination, sincere simplicity, and lasting sympathy and loyalty, are the important characteristics of the typical American—of Mr. Clemens.
 A. 
The key traits of a true American like Mr. Clemens are his faithfulness, wit, enthusiasm, sincerity, compassion, and dedication (Harkins 43).
 B. 
Mr. Clemens, a typical American, represented duty and honor, sense of humor, endless energy, bold determination, sincere simplicity, and lasting sympathy and loyalty (Harkins 43).
 C. 
Mr. Clemens was a typical American for his sense of duty and of honor, sense of humor, energy, determination, simplicity, and sympathy and loyalty (Harkins 43).