How does this quotation add credibility to Freedman's line that the voyage was an ordeal, but it was worth it? It comes from a reliable source. Edward Corsi was a professor who teaches American history. It comes from a reliable source. Edward Corsi was the captain of the steamer Florida and weathered a terrible storm. It comes from a reliable source. Edward Corsi was a reporter who wrote about Ellis Island for a newspaper. It comes from a reliable source. Edward Corsi was not only an immigrant himself but also a Commissioner of Immigration.

It comes from a reliable source Edward Corsi was not only an immigrant himself but also a Commissioner of Immigration.

Explanation:

'Immigrant Kids' is a book written by Russell Freedam on the lives of children who came as an immigrant to America. These young kids had to work as a labour in many industries to earn money. The book also sheds light on American dream for a new comer to America.

The quotation 'that the voyage was an ordeal, but worth it' were said by Edward Corsi, who himself was a ten-year old immigrant in 1907. He sailed to New York Harbour as a ten-year old immigrant. Edward Corsi, then, later became tthe Commissioner of Immigration as well.

So, the quote is credible because it is coming from a reliable source, Edward Corsi. Thus the correct answer is the last option.