What is a random sample?A set of items drawn from a population, where each item in the population has a random chance of ending up in the sample.A set of items drawn from a population, where each item in the population has an equal chance of ending up in the sample.A set of items drawn from a population on an ad hoc, unstructured, basis.A set of items drawn from a population, where some items are more likely than others to end up in the sample.