What is the domain of the continuous quadratic function y = 3x2 – 4?
A[3, +∞)
B(–∞, +∞)
C[–4, +∞)
D[0, +∞)
A[3, +∞)
B(–∞, +∞)
C[–4, +∞)
D[0, +∞)