A careful rereading of this excerpt would help a reader understand the "League" mentioned in the first sentence because:
C. The reader could make the connection between the “League” and the third sentence, which explains that they “organized strikes in the garment trade.”
Explanation:
According to the third line of the excerpt, the League had organized strikes in the garment trade. This same League, according to the first and second lines, had organized a new event and was surprised at the turnout of so many people now - so many that the speakers uses the word "army" to help readers visualize it. From that, we can infer that the League refers to a group of people who helped coordinate and organize protests and sit-ins in the pursuit of equality during the Civil Rights Movement.
