Atreus kill Aerope and some of her children because they were the children Aerope had with Thyestes.
Option: C
Step-by-step explanation:
Atreus was the father of Agamemnon and Menelaus. Atreus and his brother, Thyestes were sons of Pelops and grandson of Tantalus' son and king of Pisa. Aerope was the first wife of Atreus. Later on he married Pelopia. Atreus did it because he does not have faith on Aerope and her children. Because these children are with Thyestes.
They are his step sons. People have a common tendency to decline steps as their own. Atreus followed the same thing but later he also died by his enemies and his second wife Pelopia also raped.