Final answer:
The best choice for a low-wattage lightbulb and special filter that will not affect radiographic film is d. Aluminum.
Step-by-step explanation:
In order to not affect radiographic film, a low-wattage lightbulb and a special filter should be used. Out of the given options, the best choice would be d. Aluminum. Aluminum is an ideal material as it is both low in weight and non-toxic, making it safe to use in medical imaging.