This is moderate difficulty question. The passage has two parts, the first speaks of the dismantling of the walls to overcome all divisions, the second speaks of how something else resulted from it because of selfish business interest. Option 2 is the best choice; it says that the intention was to make things democratic, but by putting in as many people as possible in cubicles, it became a tool of exploitation of labour. Option 4 goes out because workers' satisfaction is a little far-fetched. People might work in confined spaces but they could still be satisfied with their work Option 3 is quite close, but the passage talks of intention of the companies. The inventor's idea was to dismantle barriers but the organizations took it as a tool to exploit labour. It did not work out because they did not want it to work out that way. Option 1 too misses on highlighting the exploitation of labour point, something that is critical in the passage.