问题详情

Why were passengers from Europe able to travel to New York so cheaply ？
A．Because the ships were little crowded on the trip back to New York.
B．Because shipping companies were eager to fill their ships with passengers on the return trip from Europe.
C．Because the shipping companies wanted to develop travelling industry in New York.
D．Because few Europeans longed to visit New York. 请帮忙给出正确答案和分析，谢谢！