From what I can gather, the answer is either C. Many came to join family already in the United States, or D. Many were attracted by the opportunities to fight in the Civil War. (Sorry if it doesn't help).
the anti-immigration political party founded by “nativists” was known as the Know-nothing party
I believe the answer is: directive style
In a directive style of management, the managers will specifically mentioned to the employee about the lists of what they need to do.
Even though this style may limit the employee's creativity, it would definitely satisfy the type of managers with low tolerance.
