Answer:
The correct answer would be "self-replicating RNA molecules".
Self-replicating RNA is considered as the first genetic material that evolved on earth.
RNA had capabilities of self-replication as well as catalysis due to which it was efficient to make copies of itself to be passed on to subsequent generations.
The catalytic property enables it to catalyze all the reactions necessary for its survival.
DNA is believed to evolve from RNA which enhances the stability of the genetic material.