What do you need help with then?
The third one detestable means deserving intense dislike all the other ones are showing something positive
I'm sure it's not a run-on sentence and it's not a subject/verb agreement so its Either comma splice or sentence fragmant. I think its comma splice
The correct answer is the first option, 'a benefactor and a grateful beneficiary'. They always represent good luck, or something that is going to help you along the way.
