Answer: A. A. the individual's obligation to serve his or her maker.
Explanation: "When I Consider How My Light Is Spent" is one of the most famous sonnets written by John Milton. The given phrase ""And that one talent which is death to hide..." refers to the individual's obligation to serve his or her maker, we can also verify this by other lines of the sonnet like, for example "To serve therewith my Maker, and present My true account, lest he returning chide...").