Final answer:
The statement is false; Clytemnestra was unfaithful to Agamemnon, while Penelope remained faithful to Odysseus.
Step-by-step explanation:
The statement that while Agamemnon was away, his wife Clytemnestra was faithful, as was Odysseus's wife Penelope, is false. In Greek mythology, Clytemnestra was not faithful to Agamemnon, as she took a lover, Aegisthus, during Agamemnon's absence in the Trojan War and they eventually killed Agamemnon upon his return. On the contrary, Odysseus's wife, Penelope, was renowned for her fidelity and cleverness in warding off suitors while her husband was away during the Trojan War and his extended voyage home.