题目信息
On a certain multiple-choice test, 9 points are awarded for each correct answer, and 7 points are deducted for each incorrect or unanswered question. Sally received a total score of 0 points on the test. If the test has fewer than 30 questions, how many questions are on the test?
A:Cannot be determined
B:16
C:19
D:21
E:24
参考答案及共享解析
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正确答案：
B:16
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