E
D
E
B
E
E
B
Positive
Negative
E
C
D
Positive
B
A
D
B
D
D
D
obliquity
precession
B
D
C
A
D
C
C
C
C
Mesozoic
Cenozoic
D
C
A
B
C
B
A
E
B
B
C
C
A
E
D
C
D
C
E
inductive reasoning
c
b
b
d
c
c
e
a
d
b
b
e
c
c
d
a
d
d
e
b
b
a