Correct answer is D. Comma or Period Inside Rule
A. Question mark or exclamation point inside: those are not really necessary.
B. Colon or semicolon: not, a semicolon would divide the whole sentence and it would be shorten; a colon would work but after requested, when there is already a comma.
C. Question mark or Exclamation Point Outside Rule: would not work, becase it is an very polite and affirmative sentence.
D: A comma or period inside rule: actually, just a comma would work. Please, Cooper’s dad requested, go… Cooper’s dad requested must be in between commas as it is a vocative.
Hope this helps