This is a passage with a list.
Answer:
Review the source material as you summarize it. Identify the main idea and restate it as concisely as you can—preferably in one sentence.
Answer:
a is most interactive
Explanation:
interactive=influencing or having an effect on each other
b,c, and d have something in common which is nothing having to do with the audience.
That first option INTERACTS with the audience
<span>Selective media are used for the growth of only selected microorganisms. For example, if a microorganism is resistant to a certain antibiotic, such as ampicillin or tetracycline, then that antibiotic can be added to the medium in order to prevent other cells, which do not possess the resistance, from growing. Media lacking an amino acid such as proline in conjunction with E. coli unable to synthesize it were commonly used by geneticists before the emergence of genomics to map bacterial chromosomes.</span>
