The First Evidence for a Finite, Not Infinite, Speed of Light

Multiple Choice

The first evidence for a finite, not infinite, speed of light came from observations in which

A) sunlight was observed just as the sun was fully eclipsed by the moon.
B) the orbital time of one of Jupiter's moons was observed during two successive orbits.
C) Galileo reflected a light beam from rapidly rotating mirrors in a laboratory.
D) Galileo measured the time for light to travel to a distant mountain and back again.
E) sunlight passed through a narrow slit as the sun rose at the summer solstice (longest day of the year) .