As the subject of a sentence, indefinite pronouns such as both, few, many and several always

An important reason to do research is ________

A) you will have added confidence B) your audience is more likely to listen C) you will gain the audience's respect D) all of the above

Sampling units are the

a. individual researchers who do the sampling b individual units selected for study c. geographic units from which individuals are selected d. lists from which individual research participants are selected e. computer programs used to generate a sample list