1. No.
2. You can actually do both.
3. The basic idea is if you leave the United States for less than six months at one go usually you are okay, you are not questioned too closely, but more than six months they question you very closely because of certain technical reasons.
At one year outside you lose your green card automatically unless you have something like a re-entry permit. If on the other hand, you are a U.S citizen there is no requirement that you have to stay in the United States. You can stay anywhere in the world, never have to come back again and you would still be a U.S citizen.
Note: Where transcribed from audio/video, this is a verbatim transcript of the referenced audio/video media delivered as oral communication, and, therefore, may not conform to written grammatical or syntactical form.
I got my labor, 140 and GC in less than 2 yrs. I really appreciate the timely help provided by Richa, Prerna and Mathew. And also like to thank all the legals who helped me at Rajiv Khannas firm. Thanks for keeping me updated on the status and answering my questions. I use to get response to all my question almost immediately. I highly recommend Mr.Khanna's office and staff for all immigration purposes. My special thanks to Mr. Mathew Chako and Prerna for all the help.
Thanks