To question assertions made by the author, you need to look for ( ), ( ), and ( ) that provide support.

From what the author said in Para. 1, it can be inferred that. A: scientists can never be able to predict the coming of earthquakes. B: the existing power on predicting earthquakes is somewhat exaggerated. C: quite a lot of scientific assertions are groundless. D: earthquake predictions are beyond the reach of scientists.

Which fragment is an example of inappropriate use of assertions？ （） A:  assert （!（map.contains（x）））； map.add（x）； B:  if （x > 0）{}else { assert （x==0）； } C:  public void aMethod（int x） { assert （x > 0）； } D:  assert （invariantCondition（））； return retval； E:  switch （x） { case 1： break； case 2： creak； default： assert （x == 0）；