Answer:
C). the loss of a family member.
Explanation:
In the context of the poem 'David's Old Soul,' the speaker turns into a man post the 'loss of a loved one, a family member.' However, the speaker seems filled with frustration as he is unable to alter the circumstances but it is then, he is able to accept and acknowledge the new responsibilities that he has now. He derives strength and power from his past to fulfill his responsibilities properly which helps his 'soul grow deep like rivers.' Thus, option C is the correct answer.