Answer:
Ever since he was a child, my father was both serious and subdued.
Explanation:
The biggest problem about this question is finding the appropriate synonyms for adjectives describing his father. His opinion about his father is influenced by his memories and experience, as well as stories from people who knew him. We see that his father was dutiful, orderly and a little quiet, which excludes the answer D. However, he wasn't melancholy, which excludes the answer A. Also, we don't see any descriptions about his father's relationship with the family, thus making B incorrect answer. That leaves us with C as the best fitting answer.