I believe it is B hope this helped you<span />
please include the puzzle and or questions.
They may require things such as plastic cut outs and glass depending if you want to be able to have a window to look into the pc. Some cases are 3D Printed although they have to be joined by screws at the end due to the fact that one whole print can take over a week and then it has to be well doesn't but looks better when sanded.
1) Use a good cam 2) Make sure you focus on it 3) Make sure you snap it at the right time.... I hope this helps!!!!!