Archaeans Are Often Referred to as "Extremophiles" Because They Are

Archaeans are often referred to as "extremophiles" because they are

A) capable of living in extreme environments where other organisms cannot function.
B) the only living organisms to reproduce using binary fission, an extreme form of asexual reproduction.
C) examples of the earliest life-forms on Earth and have existed for an extremely long time.
D) single-celled organisms that have extreme mechanisms for causing diseases in humans.