reference
stringclasses 4
values | answer
stringclasses 6
values |
|---|---|
D
|
D
|
A
|
A
|
B
|
B
|
B
|
A.
|
C
|
D
|
B
|
A.
|
C
|
A
|
C
|
A
|
B
|
A
|
A
|
A
|
D
|
A
|
A
|
A
|
B
|
A
|
C
|
B
|
C
|
A
|
B
|
A
|
B
|
D
|
A
|
B
|
D
|
C
|
A
|
A
|
A
|
A
|
D
|
D
|
A
|
A
|
B
|
A
|
B
|
A
|
D
|
A
|
B
|
A
|
C
|
A
|
D
|
D
|
B
|
A
|
A
|
B
|
D
|
A
|
B
|
A
|
A
|
C
|
B
|
A
|
C
|
A
|
D
|
A
|
D
|
A
|
B
|
A
|
D
|
A
|
D
|
A
|
C
|
B
|
B
|
A
|
C
|
A
|
A
|
A.
|
A
|
A
|
B
|
A
|
A
|
A
|
B
|
A
|
B
|
A
|
D
|
A
|
D
|
A
|
C
|
A
|
A
|
A
|
A
|
A
|
B
|
A
|
B
|
A
|
B
|
A
|
C
|
A
|
A
|
D.
|
B
|
A
|
C
|
C
|
B
|
B
|
C
|
A
|
D
|
A
|
D
|
A
|
A
|
A
|
C
|
A
|
D
|
A
|
B
|
A
|
C
|
D
|
D
|
D
|
C
|
A
|
D
|
A
|
B
|
A
|
B
|
D
|
A
|
B
|
B
|
A
|
B
|
B
|
B
|
A
|
C
|
A
|
D
|
A
|
A
|
A
|
C
|
D
|
A
|
C
|
D
|
D
|
B
|
B
|
D
|
A
|
C
|
A
|
A
|
A
|
D
|
D
|
D
|
A
|
A
|
A
|
C
|
A
|
A
|
A
|
C
|
A.
|
D
|
A
|
D
|
A
|
C
|
C
|
C
|
D
|
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