Once inside Clinton Hall, the writer found a different climate. At the end of a swarming corridor a fortification had been set up, made of desks and tables; this was the League's information bureau, where scores of confused, excited workers waited to register for the union. Heavily bearded old men pushed through the crowd selling apples and pretzels from baskets.

Which best states the author’s purpose for describing the inside of Clinton Hall in the text?

to challenge the reader’s ideas about the importance of the league
to help the reader imagine what the hall looked, felt, and smelled like
to give the reader facts about the hall’s size and the number of people there
to show the reader how the league in the past is the same as it is today