Describe the graph of ​g(x)​=f(x)+k compared to the graph of​ f(x).

Choose the correct answer below.
A. The graph of ​g(x)=​f(x)+k would be shifted k units down.
B. The graph of ​g(x)=​f(x)+k would be shifted k units to the right.
C. The graph of ​g(x)=f(x)+k would be shifted k units to the left.
D. The graph of ​g(x)=​f(x)+k would be shifted k units up.