Which function represents a reflection of f(x) = Three-eighths(4)x across the y-axis?

A. g(x) = NegativeThree-eighths (one-fourth) Superscript x
B. g(x) = Negative three-eighths(4)x
C. g(x) = Eight-thirds(4)-x
D. g(x) = Three-eighths(4)–x