The Negation technique can help you out here. We have a passage that basically says that predictions about how a society (which has frequent S and T discoveries) will turn out are particularly untrustworthy.
Scientific and technological discoveries have considerable effects on the development of any society. It follows that predictions of the future condition of societies in which scientific and technological discovery is particularly frequent are particularly untrustworthy.
The argument depends on assuming which one of the following?
(A) Predictions of scientific and technological discoveries, or predictions of their effects, have harmful consequences in some societies.
Where the discoveries have positive or negative effects is beside the point. Are they predictable? This answer is out.
(B) The development of a society requires scientific and technological discoveries.
Nope. Nothing written about this and totally not what we are looking for.
(C) Forecasts of scientific and technological discoveries, or forecasts of their effects, are not entirely reliable.
Negate this and see if it destroys the argument -
Forecasts of scientific and technological discoveries, or forecasts of their effects, ARE entirely reliable. Yep, this is the answer.
(D) An advanced scientific and technological society frequently benefits from new discoveries.
Not written. Not needed to judge accuracy of predictability.
(E) It is not as difficult to predict scientific and technological discoveries in a technologically more advanced society as it is in a technologically less advanced society.
This one might have tripped some people. But we are not interested in the CURRENT level of advancement. We are interested in how FREQUENT advances affect PREDICTIONS.