Which of these passages from the Ramayana shows the importance of the concept of dharma in the lives of the characters?

A. "At the bidding of the king my parent and author of my welfare, I will gladly drink deadly poison or throw myself into the sea."

B. "Kaikeyi thus addressed by Shri Rama, dead to all shame and skillful in defence of her selfish purpose, spoke arrogantly."

C. "He loves thee dearly and so hesitates to tell thee this unpleasant matter."

D. "On account of this is the king distressed, his countenance pale and he is unable to look on thee."