Halo stars appear redder. Halo stars appear to have high velocities. Cepheid variables are regularly pulsating stars. For the following questions, use the HR Diagram above. For each question, write down the letter which corresponds to the proper location on the diagram.
E is the the region between the dashed lines.
W, X, Y, and Z are stars labelled by the black filled circles. Answer is C . Answer is B . Answer is D . Answer is A .