Final answer:
The challenge of representing the distances of the planets on a centimeter grid paper is that the scale factor is insufficient for accurate representation and the distances would be too large to fit within a single square on the grid.
Step-by-step explanation:
The challenge of representing the distances of the planets in our solar system on a centimeter grid paper, where 1 cm represents 100,000,000 km, is that the scale factor of 1 cm = 100,000,000 km is insufficient for accurate representation (option D). The distances of the planets in the solar system range from 58,000,000 km to 4,500,000,000 km, which means that the distances would be too large to fit within a single square on the grid. Therefore, the grid paper is not suitable for representing such vast distances (option B).