If all the countries of the world had "open borders". (Open borders are policies which permit people to move freely between countries or political jurisdictions without any restrictions). What would be 4 advantages and 4 disadvantages of such a situation. 4+ 4 points What is your opinion and why? 2 points Please do not write just a sentence or part of a sentence. Explain your statements in full detail. Please do not copy and paste from any sources and write in your own words. Any answer that is found to be copied from any online source will be given a 0. If you take information from any online source please cite the source properly