Question R16 Q7 - NSB Regional 2007

Which of the following is the BEST description of a Cepheid variable star:

W) a pulsating variable varying in brightness in a very regular time period of 1 to 50 days

X) a short pulsating variable with a very regular period of 1 to 4 minutes

Y) a binary star system with an eclipsing partner

Z) a small k-type star with a very regular period of 1 to 3 weeks

Science Bowl Question