The correct answer is C. The minister flew over flooded areas in a helicopter.
The other options are incorrect because they do not accurately describe the movement of the minister. Option A, about, suggests that the minister was flying in a circular or elliptical pattern around the flooded areas. Option B, in, suggests that the minister was flying at a low altitude and close to the ground. Option D, along, suggests that the minister was flying parallel to the flooded areas.
The minister was flying over the flooded areas in a helicopter, which means that he was flying above the areas and looking down on them. This is the most logical way to view flooded areas from a helicopter, as it allows the viewer to get a good overview of the situation.