Final answer:
The vertical shift of the function g(x) is Upward shift of 3 units.
Step-by-step explanation:
The equation for the function g(x) = -4sin(2x - π) + 3 represents a sinusoidal function. The coefficient in front of the sine function, -4, represents the amplitude of the function. The π in the argument of the sine function represents a horizontal shift. Since the coefficient in front of x is 2, the period of the function is π/2. There is no vertical shift, as the constant term +3 represents the vertical position of the midline of the function.
Therefore, the correct answer is A) Upward shift of 3 units.