A Star Moving Toward the Sun Will Show

Multiple Choice

A star moving toward the Sun will show:

A) a shift in the spectral lines toward the blue end (as compared to the laboratory positions of these lines)
B) a significant increase in its apparent brightness (magnitude)
C) more and more helium lines as it approaches us
D) a shift in the spectral lines toward the red end (as compared to the laboratory positions of these lines)
E) no change that can be measured with our present-day instruments