A、Almost everyone knows the language. B、Only a few people know the language. C、It is similar to Germanic languages. D、It shares

Have you ever found yourself in this situation: You hear a song you used to sing when you were a child? But it is not a distant childhood memory. The words come back to you as clearly as when you sang them all those years ago.
    It seems there is a scientific reason for this.
    Researchers at the University of Edinburgh studied the relationship between music and remembering a foreign language. [16] They found that remembering words in a song was the best way to remember even one of the most difficult languages.
    Here is what they did.
    Researchers took 60 adults and randomly split them into three groups of 20. Then they gave the groups three different types of "listen-and-repeat" learning conditions.
    Researchers had one group simply speak the words. They had the second group speak the words to a rhythm, or beat. And they asked the third group to sing the words.
    All three groups studied words from the Hungarian language for 15 minutes. Then they took part in a series of language tests to see what they remembered.
    Why Hungarian, you ask? [17] Researchers said they chose Hungarian because not many people know the language. It does not share any roots with Germanic or Romance languages, such as Italian or Spanish.
    After the tests were over, the singers came out on top.
    [18] The people who learned these new Hungarian words by singing them showed a higher overall performance. They did the best in four out of five of the tests. They also performed two times better than those who simply learned the words by speaking them.
    Dr. Katie Overy supervised the study at the university’s Reid School of Music. She says singing could lead to new ways to learning a foreign language. The brain, it seems, likes to remember things when they are contained in a catchy, or memorable, tune.
    Dr. Overy worked with Dr. Karen Ludke and Professor Fernanda Ferreira on this study. Dr. Ludke said the findings could help those who struggle to learn foreign languages. On the University of Edinburgh’s website Dr. Ludke writes, [19] "This study provides the first experimental evidence that a listen-and-repeat singing method can support foreign language learning."
    16. What did the researchers at the University of Edinburgh find?
    17. What is the reason for choosing Hungarian in the study?
    18. What is the result of the tests?
    19. What is the significance of the study?