A sphere is lit by a single directional light source where the light is shining downwards. 

Remember, with a sphere, the normals always point outward from its center.

The sphere is made of a purely diffuse material (so it has only diffuse lighting). Assume there is no distance falloff (we did not discuss distance falloff in class). Assume this is standard diffuse shading (which was discussed in the readings and class). And assume 1-sided lighting.

When we talk about "brightest point", "top" and "bottom" in these questions, we are referring to their position in the world (not the resulting image).

Question 1
4 / 4 pts
The brightest point of the sphere is at its top. Which of the following is true:
  The brightest point may move (to a different point on the sphere) if the camera moves. 
  The brightest point may become brighter if the camera moves. 
  If ambient lighting is added, the brightest point will move. 
  All of the Above. 
  None of the Above 

 Respond with at most 200 words.
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