The answer is the struggle between realistic and supernatural elements
I think it is because the answer choice "A" does not provide an explanation for why everything tasted sweet, leaving the reader wondering. D, however, gives an explanation.
The answer is "What is the story of Hercules, and what lesson does it teach?" question which is an effective research question in developing an essay topic. The effective research question must be both focused and broad to create the basic of the following research steps such as preliminary research<span>. The question above shows a focused topic of Hercules and shows broad coverage in its lesson.</span>