Astronomers First Detected the Presence of a Wind of Particles

Multiple Choice

Astronomers first detected the presence of a wind of particles coming from the Sun by

A) sending a spacecraft much closer to the Sun than the planet Mercury
B) by noting its effects on the atmosphere of Venus
C) by dramatic and sudden changes in the spectrum of coronium
D) using the experiments aboard Sputnik 1, the first spacecraft to go above the Earth's atmosphere
E) by noting the wind's effects on the tails of comets