What is the equation for g, which is f(x) = 2x2 + 3x − 1 reflected across the y-axis?

A. g(x) = 2x2 + 3x − 1
B. g(x) = −2x2 − 3x + 1
C. g(x) = 2x2 − 3x − 1
D. g(x) = −2x2 − 3x − 1