I can see why A is right....but

Honestly, when I read this passage, I knew that the flaw was that the author was assuming that just because something is desirable it HAS to be technological superior. That isn't true. People can desire something that isn't technological superior. There could be other factors as to why people choose something that is more desirable other than stating that it MUST be technologicaly superior. I picked E because it was making an assumption. Unless I'm incorrect about presupposition not meaning assumption. Presuppose and assumption I often confuse those terms to mean the same thing but I guess it's not. But A was obvious but lack of vocab terminology can also lead to the wrong answer...