Srry pls help me Number 1 and Number 2

Which of the following statements is true? a individual productivity is more important than group productivity b sacrifice isn’t necessary to achieve group goals c individual productivity is necessary for group productivity d waste isn’t a problem in reaching group goals

Which historical detail can best clarify a reader’s understanding of the information in the excerpt? immigrant factory workers who spoke the same language were separated from each other at work. immigrant factory workers who spoke the same language were known to talk too much at work. immigrant factory workers had to pay rent for their chairs and the supplies they needed at work. immigrant factory workers were crowded into unsafe buildings with locked doors and fire escapes.

What is the meaning of the word checking as it is used in this sentence from the second paragraph of the passage?