<span>Merlin lives backwards so he knows that the child that will be born (Arthur) will be future king, so he makes the bargain with Uther to have the child.</span>
c hope you have a great day
The answer is A how it was cast
I'd like to say its a conversational(<span>appropriate to an informal conversation)</span> and inquisitive(curious or inquiring) tone
If i remember right the technique is something related to descriptive detailism (sorry if it isnt a word)