They were passing through on their way to the West Coast.
Leland Stanford sent ships to China <span>to transport workers to lay railroad tracks.
During that period, many Chinese immigrants seeks a way to United States in order to buy new lands for Gold mining.
Standford saw this as an opportunity to get additional workers in railroad building so he sent a ship there.</span>
I think it’s A or D but most likely A
Philadelphia received it's name from the Quaker William Penn in 1681.