In a(n) _____________________ sample,each person (or thing) has an equal chance of being chosen.

A) availability
B) probability
C) nonprobability
D) convenience

In a probability sample, each person or thing has an equal chance of being chosen, which means that the sample is randomly selected and representative of the population. Option A (availability) refers to a sample that is chosen on the basis of what is easily accessible, which may not be representative of the population. Option C (nonprobability) refers to a sample that does not involve random selection, which may introduce bias into the sample. Option D (convenience) refers to a sample that is chosen based on what is convenient, which may also introduce bias into the sample.