Which method is most useful at the beginning for maintaining correct proportions of a complex object?

Correct answer: Dividing it into simple geometric forms

The governing construction principle is to simplify a complex subject into basic geometric forms such as boxes, cylinders and spheres before adding details. These forms establish height, width, tilt and relative size, making proportion easier to check and correct. Therefore option C is correct. Dark shadows, a contour alone or a coloured outline can be added later, but none gives as reliable an initial proportional framework.