Why not C?

An obvious flaw in this argument is the author does not establish that maintenance of robots is demeaning work. The problem I see with E is that its immaterial if more or less people are participating in demeaning work author argues against the proposition that all of humanity can be *liberated* from demeaning work by using robots because their maintenance is demeaning. If we get robots to do all the demeaning work, people will have to maintain them thereby ensuring a minimum amount of demeaning work and ensuring humanity can never be liberated from demeaning work through the use of robots.