Add three points for each correct answer, subtract one point for each incorrect answer

A score of 42 points is passing

1-->C 6-->A 11-->C 16-->B
2-->B 7-->A 12-->B 17-->C
3-->A 8-->C 13-->A 18-->D
4-->D 9-->D 14-->C 19-->D
5-->B 10-->B 15-->A 20-->B