Let
f
(
x
)
=
3
x
3
+
a
x
2
+
b
−
x
3
+
c
x
+
d
f(x)=
−x
3
+cx+d
3x
3
+ax
2
+b

f, left parenthesis, x, right parenthesis, equals, start fraction, 3, x, cubed, plus, a, x, squared, plus, b, divided by, minus, x, cubed, plus, c, x, plus, d, end fraction, where
a
aa,
b
bb,
c
cc, and
d
dd are unknown constants.
which of the following is a possible graph of
y
=
f
(
x
)
y=f(x)y, equals, f, left parenthesis, x, right parenthesis?