Answer: A. A stunning hero, the brave soldier urged his fellows to stand strong, to fulfill their oath, and to not leave even one person behind
Step-by-step explanation:
The most effective revision of the sentence below is option A"stunning hero, the brave soldier urged his fellows to stand strong, to fulfill their oath, and to not leave even one person behind."
Based on the options given, the best answer is option A. Option B and C are incorrect as the sentence isn't revised properly.