I think that B, C, and D, would rather be good news in most typical circumstances, and only in some very atypical ones could they qualify as a stressor.
On the other hand, A is a potential stressor: you could be unsure whether your house is clean enough for the visit!
The telephone because it allowed people to be connected over long distances
The car because we literally use it every day
The airplane because travel around the world has been sped up
D. A plateau period means that there is no change, bad or good. Options A-C are exciting changes, meaning there is an uphill change. However in D, nothing is changing at all.
Muslim rulers built great cities where scholars and artists made great innovation and adaption and cultural diffusion could take place
There was the humanist movement (the Renaissance)
the discovery of the new world ( Columbus)
and the french revolution
(sorry, i only know those 3)
