How does the graph of g(x)=2⌈x⌉ differ from the graph of f(x)=⌈x⌉?


A) Multiplying by 2 compresses the graph of ​g(x)=2⌈x⌉​vertically by a factor of 2.

B) Multiplying by 2 stretches the graph of ​g(x)=2⌈x⌉ vertically by a factor of 2.

C) Multiplying by 2 shifts the graph of​ ​g(x)=2⌈x⌉​ up 2 units.

D) Multiplying by 2 shifts the graph of ​g(x)=2⌈x⌉​ ​down 2 units.