Which of the following is a run-on sentence?

a. tomas was frustrated during class he forgot his book report.
b. they danced for hours; they never felt remotely tired.
c. the concert started and the music was incredible.
d. holidays always go by too quickly since i get those days off.

In your own honest opinion, what are your views on same-sex relationships/marriage? be sure to include at least 2-3 paragraphs with correct spelling and appropriate language. be sure to explain why you feel/think the way you do about this particular topic. support your answer with supporting details.(for anyone that answers do not hate on anyone's answer, we all have our own point of views and opinions)