The reader can infer from the article that:

a. The two-story barracks that have been restored to their original condition on Angel Island will probably not be of interest to any Americans.
b. After being subjected to unfair treatment at the Angel Island facility, it probably took a long time for many Chinese immigrants to feel comfortable living in the U.S.
c. The fact that China was a U.S. ally during World War II probably didn't mean much to the U.S. government at the time.
d. After restoring the barracks at Angel Island, officials have probably decided to start using the station again to process new immigrants to the U.S.