Figure 15-1 The Accompanying Graph Above (Figure 15-1) Clearly Shows That ____

  Figure 15-1
The accompanying graph above (Figure 15-1) clearly shows that ____.

A) Type I Cepheid variables are always brighter than Type II Cepheids
B) Type II Cepheid variables always have shorter pulsation periods than Type I Cepheids
C) Type I Cepheids are always more distant than Type II Cepheids
D) RR Lyrae stars can have longer pulsation periods than Cepheid variables
E) RR Lyrae stars are always dimmer than Cepheid variables.