From a relationship stand point, which one do you want to maintain longer: friends or family? Your friends might be friends for life. Or a few missed rent payments and you're struggling to keep your home. On the other hand, your parents are offering to support you fully for the remainder of school and reward you for that. It's almost like they know something about college roommates. Option A is fraught with financial & relationship risk whereas Option B is much less so. In college, your goal should be completing your education which means being able to focus on that...not adding layers of risk outside of school.

Others have mentioned how bad dorm life can be. They may be romanticizing off campus life a bit. Just think about what you are literally signing up for. You are going to sign a legally enforceable contract with other people while being dependent on those other people to execute said contract successfully. You're basic cosigning a debt with a couple of college kids. If something goes wrong, you are legally and financially responsible. That could mean it ends up in collections or on your credit report for 7 years!! That's quite a risk when compared to Option B. Not to mention the damage it could do to your friendships and relationship with your parents when/if you ask them to bail you out. What if they say no? You opted for this and this is what being an adult looks like.

Make your parents happy and take the dorm and car. College is a few short years in a lifetime of relationships. If your friends are true friends they will understand and you'll hang at their place a lot anyway. Your parents have wisdom from years of life...leverage that wisdom and take Option B. It's the smarter long term choice.

If I were in your shoes, I would take Option B. Many of us weren't as lucky as you to have such caring and supportive parents. Take advantage of that. And then spend the rest of your life being appreciative of everything they have done for you.