Answer:
a: Repeat the experiment several times in order to verify the results
Explanation:
Computer simulations are models. They follow specific instructions and act based on those set of parameters.
Models study a part of the real world and makes useful inference from them. It is often common place to observe discrepancies between computer simulation and what is found in the actual experiment.
The most efficient thing to do is to run and repeat the experiment several times so as to verify the result. It will also help the precision and to know how accurate the readings might be.