As one worker remembered it, "Well, so we stayed whispering, and no one knowing what the other would do, not making up our minds, for two hours. Then I started to get up. And at just the same minute all — we all got up together, in one second. No one after the other; no one before. And when I saw it — that time — oh, it excites me so yet, I can hardly talk about it. So we all stood up, and all walked out together. And already out on the sidewalk in front the policemen stood with the clubs. One of them said, ‘If you don't behave, you'll get this on your head.’ And he shook his club at me.["] Which best states the author’s purpose for including this quote in the text?

to persuade the reader that strike was not a good idea for the workers
to give the reader the facts about when and where the strike took place
to tell the reader what the police felt and saw when the strike began
to help the reader feel the excitement and unity of the striking workers