Marine Officer Vs. Marine Enlisted (serious question)?

I am interested in joining the military and have a few questions that I need answered. 1. What branch of military is the best? (Navy, Army, Air Force, Marines) 2. What is the difference of becoming a Marine Officer versus becoming a Marine Enlisted? 3. What is ROTC and/or JROTC? 4. And what is the best way to... show more I am interested in joining the military and have a few questions that I need answered.
1. What branch of military is the best? (Navy, Army, Air Force, Marines)
2. What is the difference of becoming a Marine Officer versus becoming a Marine Enlisted?
3. What is ROTC and/or JROTC?
4. And what is the best way to become a special ops member?
Update: 5. If I were to join the Marines as an enlisted, would it be possible to rank up and if so, how far up could I go?
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