The theme that best fits the Ramayana is A. Strenght comes from surrounding yourself with friends.
The story of Ramayana describes how the prince, after being exhiled along his wife, Sita, and his brother, Lakshmana, needs to rescue his abducted wife from the hands of the evil demon Ravana. In order to do so, Rama and his brother form an alliance with the monkey king Sugriva, who provides him with an army they later use to defeat Ravana.
If Sugriva had not become friends with the two brothers, they never would have been able to save Sita from her captor.