Final answer:
The correct word to complete the sentence is 'wed,' which means to get married, fitting the context of the promise of marriage before the next birthday.
Step-by-step explanation:
The sentence “And that's not all. I promised I'd have you married before your next birthday.” is referring to the act of getting someone married. The main answer to choose from the given options would be (d) Wed, as 'to wed' means to get married or to enter into the state of marriage. The other options, namely coronated (a variation of 'coronated,' typically used for a formal crowning of a sovereign), knighted (a term used for the formality of being made a knight), and crowned (which means to place a crown upon the head, typically in the context of monarchy), do not match the context.In conclusion, the word 'wed' correctly completes the promise made in the sentence, indicating that the individual would be married before their subsequent birthday.