Final answer:
Bias is a potential source of error.
Step-by-step explanation:
Out of the options given, the potential source of error is c) Bias.
Precision refers to how close multiple measurements are to each other, indicating consistency. Accuracy refers to how close the average value is to the true value. Randomness is the statistical variability of measurements.
In scientific experiments or studies, bias can occur if the sample is not selected randomly or if the researcher is fixated on a single trait or relies on false stereotypes to make decisions.