What is a prediction?

A guess about what will happen as a consequence of something else

A retest of experimental results to make them reliable

Background research completed with questioning

A conclusion derived from evidence and logical reasoning

A prediction is not based upon evidence or reliable tests. A prediction is a guess as to what will happen in the future. Forecasts for example are nothing more than prediction, as even with "meteorological evidence", nothing is ever truly sure when in regard to wheather.

So "A"