A run-on sentence is a sentence having two independent clauses with improper punctuation and without conjunctions. The correct answer is option b. It is difficult to understand a run-on sentence because you cannot identify where to pause or stop and that the sentence does not have conjunctions which would help in the transition of clauses.
Noun clauses are dependent clauses and can serve the role of the subject in a sentence. In this cause, the noun clause is "whomever wins the Spirit Award". The person winning the spirit award is doing an action, so they are the subject of the sentence.
I don't get your question
Answer: see below
<u>Explanation:</u>
1) correct
2) I would have gone there if I had enough money.
3) If Muza had finished her project on time, she would have gotten a better mark.
4) correct
5) I would have been very happy if my brother called me yesterday.
<em>I didn't understand what you meant to type for sentence #2, so check that I wrote the correct sentence.</em>