The correct answer is: C. the magnetic needle and graduated circle do not move with the box
The prismatic compass is a type of compass that uses a prism to magnify the image of the compass needle. The magnetic needle and graduated circle are fixed to the box, so they do not move when the compass is turned. This makes it easier to read the compass heading.
The other options are incorrect because:
- Option A is incorrect because the magnetic needle does not move with the box.
- Option B is incorrect because the line of sight does move with the box.
- Option D is incorrect because the graduated circle is not fixed to the box.