Consider the functions below.
f(x)=(3/2)^3 and g(x)=(3/2)^3+k
The function g has been shifted k units vertically from its parent function f.
Which statement best describes the value of k so that the graph of g crossed the x-axis but never falls below a venue of -4?
A. The value of k must be less than 0 and greater than or equal to -4.
B. The value of k must be less than or equal to -1.
C. The value of k must be greater than -4.
D. The value of k must be greater than or equal to -4.