You did not include options in your question, but based on the meaning of the word cryptic, your answer will be 'A HIDDEN MEANING'.
When you say that something is cryptic, it means that, that thing has a meaning that is mysterious or obscure.
From the way the word was used in the given sentence, it means that the message the teacher was passing across about the test is hidden, it was not understood by any of the students.
Despite belonging to a family of musicians, the youngest Yang, Yingtao, was never good at making music. When he transferred to another school in Seattle, Yingtao realized that there is something he liked more than playing the violin. However, he needs to practice for a family recital to help his father. As a result, Yingtao is being torn into whether choosing his own passion or continuing his family’s legacy.
You have to cite the resource and give the person who wrote the article credit to not be accused for plagiarism.
The answer is A, uneven parallelism, because of "with" and "who".