A Lens with Spherical Surfaces Suffers from Spherical Aberration Because

Multiple Choice

A lens with spherical surfaces suffers from spherical aberration because

A) the lens sags under its own weight, distorting the image.
B) the starlight is distorted by turbulence in Earth's atmosphere.
C) different colors are focused at different distances from the lens.
D) different parts of the lens focus the light at different distances from the lens.