Respuesta :
I think the answer is that Central America had the advantages of having other countries to import and export goods to. another could be that they have someone on their side if they ever get in a war. A few disadvantages could be that when you import and export with another country they could but a bomb in a shipment. Also that they could know some things that you are planning and use it against you.
The disadvantages and advantages were that the Americans were doing business in the Central America, with instability on history of conflict, and was weighed against it. Now the advantages were that they were against on the growing of economic presence of the Europeans and Asians on the economies of Central America.
Hope this helped :D