In the sentence:
My best friend wrote a funny poem about her pet rabbit.
The simple subject is 'friend'. Remember that a simple subject is the main word or words in a subject, so it does not include any of the modifiers that might describe, characterize or restrict the subject (in this case, the possesive 'my' and the adjective 'best')
You're answer is going to be C.
Answer:
SRY BRO BUT HAVE TO DELETE APP LIKE GAMES THEN U CAN CONTRATE
"The Judges' combined score moved the competitor to the top of the scoreboard" is the correct response because in this case "Judges" is plural so the apostrophe is outside.