What Is the Slope of the Tangent Line to the Curve

Multiple Choice

What is the slope of the tangent line to the curve $x y ^ { 3 } + y - 1 = 0$ at the point (0, 1) ?

A) $- 3$
B) $- 2$
C) $- 1$
D) 0
E) 1
F) 2
G) 3
H) 4