Question

What notion was challenged by the work of postwar-era scientists?

There are no answers.
Accuracy is impossible.
Science can explain everything.
Scientific theories reflect reality.

Answer 1

The notion that was challeneged by the work of postwar-era scientists (This refers to the works of quantum physicists) was that science could explain everything - this was shown through the work in quantum physics which showed that certain information about particles couldn't simply be accessed. 

Answer 2

The correct answer for the question that is being presented above is this one: "Science can explain everything." The notion that was challenged by the work of postwar-era scientists is that Science can explain everything. There are some instances that there is beyond Science and can't be explained by Science.