Which function's graph is the graph of f(x)=x² shifted down

Last updated: 7/8/2022

Which function's graph is the graph of f(x)=x² shifted down 20 units? a) g(x)=(x-20)² b) g(x) = (x+20)² c) g(x) = x² + 20 d) g(x)= x²-20