If v, t and $$\frac{{\text{f}}}{{\text{H}}}$$ are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement

A. $${\text{i}} = \frac{{{\text{v}} \times {\text{t}} \times {\text{H}}}}{{\text{f}}}$$

B. $${\text{i}} = \frac{{{\text{v}} \times {\text{f}}}}{{{\text{t}} \times {\text{H}}}}$$

C. $${\text{i}} = {\text{v}} \times {\text{t}} \times \frac{{\text{f}}}{{\text{H}}}$$

D. $${\text{i}} = \frac{{{\text{t}} \times {\text{H}}}}{{{\text{v}} \times {\text{f}}}}$$

Answer: Option C