I passed all of my final exams now i can prepare for graduation. which is not a run on sentence
a. I passed all of my final exams now, i can prepare for graduation.
b. I passed all of my final exams, now i can prepare for graduation.
c. I passed all of my final exams; now i can prepare for graduation.
d. I passed all of my final exams, now, i can prepare for graduation.

C. “I passed all of my final exams; now I can prepare for graduation.”

A semicolon can be used to join two related independent clauses.

the personification of the word prudence d) it effectively enhances the logos and ethos of the argument.

logos means appeal to the logic or reasoning of the people.

ethos means appeal to the credibility of the argument, that it is worth listening to and acting upon.