@NejlaNahvi I had the same issue. Both were referenced as being "pre technological"; AC A therefore doesn't require much of a leap (thought AC C required more of an assumption). Can someone help explain why A is definitively wrong?

I don't understand answer choice B; I thought "simulated" took this answer out of the running. Can someone explain to me how that doesn't disqualify the AC?

for question 3, is the "and" not converted into an "or" when flipped and reversed?