Which of the Following Statements Best Defines a Random Sample

Which of the following statements best defines a random sample?

A) A poll in which there is no way to ensure that the opinions expressed are representative of the larger population
B) In the context of opinion polling, a group of people selected to represent the population being studied
C) An atypical subgroup of the population
D) In the context of opinion polling, a sample in which each person within the entire population being polled has an equal chance of being chosen
E) A campaign tactic used to feed false or misleading information to potential voters, under the guise of taking an opinion poll