You Read About the Discovery of Quasars with Redshift Z

Multiple Choice

You read about the discovery of quasars with redshift z larger than 1.This means that

A) their host galaxies are receding at speeds exceeding the speed of light.
B) the measurements of redshift must be wrong; z cannot exceed 1.
C) the relationship between z and receding speed must account for relativistic corrections.
D) the speed of light can exceed c in the case of distant quasars.
E) quasars must contain a lot of dark matter.