What effect does changing the function f(x)=1/2sin(x)+2 to the function g(x)=2sin(x)+8 have on the graph of f(x)?

Choices:
A.The graph is vertically stretched by a factor of 6 and shifted up 4 units.

B.The graph is horizontally stretched by a factor of 4 and shifted up 6 units.

C.The graph is horizontally stretched by a factor of 6 and shifted up 4 units.

D.The graph is vertically stretched by a factor of 4 and shifted up 6 units.