Using the Hubble Space Telescope,you Discover a Cepheid Variable Star

Using the Hubble Space Telescope,you discover a Cepheid variable star in a nearby galaxy that has a period of 10 days and an apparent magnitude of 20.If nearby Cepheids follow a period-luminosity relationship that says the luminosity of the star is then what is this Cepheid's absolute magnitude and distance? Note that the Sun's absolute magnitude is 5.

A) -13 and 60 kpc
B) -13 and 10 Mpc
C) -4 and 600 kpc
D) -4 and 1 Mpc