Exam 1
E
F
D
A
B
C
A
C
C
D
B
A
C
B
C
A
D
B
A
C
B
B
B
C
C
B
B
A
C
B
B
B
A
D
A
B
B
D
D
B
A
D
Exam 2
B
B
A
D
D
B
D
B
B
B
A
B
C
D
D
C
A
C
A/C
A
B
E
B
C
D
D
B
C
B
B
C
A
B
B
D
C
C
E
Exam 3
B
D
A
B
C
A
C
C
A
A
A
D
C
A
B
Environmental Protection Agency
A
D
A
B
A
B
D
B
B
C
B
A
A
B
C
A
C
D
C