Consider a star behind a cloud of interstellar gas and dust as seen from our perspective. Which of the following would you see? a. The star appears brighter than it would if the cloud were not...

Consider a star behind a cloud of interstellar gas and dust as seen from our perspective. Which of the following would you see? a. The star appears brighter than it would if the cloud were not present, b. The star appears to be moving toward us, c. The star appears redder than it would if the cloud were not present, d. The star would be invisible at all wavelengths, e. The star would always appear green.