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.