The observed acceleration of distant galaxies away from us is evidence for: an effective change in the force of gravity at large distances.

1. The observed acceleration of distant galaxies away from us is evidence for: d. dark matter being the primary component of the universed.Photons that penetrate the sun's chromospheres3.If the observed wavelength of light emitted by an object is shorter than when that object is at rest, then:d. the object is emitting light less frequently than when it is at rest.