One day a teacher was giving her young students a lesson on how the government works . She was trying to explain the principle of income tax  . "You see ," she began , speaking slowly and carefully , "each person who works must pay part of his or her salary   to the government . If you make a high salary , your taxes are high . If you don't make much money , your taxes are low ." "Is that clear ?" she asked . "Does everyone understand the meaning of income tax ?" The students nodded. "Are there any questions ?" she asked . The students shook their heads . "Very good !" she said . "Now ,I would like you to take a piece of paper and write a short paragraph on the subject of income tax ." Little Joey was a slow learner . He had lots of problems with spelling and grammar , but this time he at least seemed to understand the task . He took his pen and after a few minutes , he handed the teacher the following composition : Once I had a dog . His name was Tax . I opened the door and in come Tax . After the teacher's explanation ,  _  .
all the students shook their heads many of the students were still puzzled not all the students understood the meaning of income tax a few students disagreed with their teacher
Question: One day a teacher was giving her young students a lesson on how the government works . She was trying to explain the principle of income tax  . "You see ," she began , speaking slowly and carefully , "each person who works must pay part of his or her salary   to the government . If you make a high salary , your taxes are high . If you don't make much money , your taxes are low ." "Is that clear ?" she asked . "Does everyone understand the meaning of income tax ?" The students nodded. "Are there any questions ?" she asked . The students shook their heads . "Very good !" she said . "Now ,I would like you to take a piece of paper and write a short paragraph on the subject of income tax ." Little Joey was a slow learner . He had lots of problems with spelling and grammar , but this time he at least seemed to understand the task . He took his pen and after a few minutes , he handed the teacher the following composition : Once I had a dog . His name was Tax . I opened the door and in come Tax . After the teacher's explanation ,  _  .
A. all the students shook their heads
B. many of the students were still puzzled
C. not all the students understood the meaning of income tax
D. a few students disagreed with their teacher
Answer: