Final answer:
The author took approximately 6 to 9 weeks to write her first book 'Wedding Vows,' with the average reported time being forty-five days. The correct option is A.
Step-by-step explanation:
The duration it took for the author to write her first book "Wedding Vows" falls into the category of approximately 6 to 9 weeks, according to the reference provided. Specifically, the average reported time to write a book, as cited by Willcocks in 1913, is forty-five days.
Other durations have been mentioned in various sources; for example, Barois in 2010 provides different time frames. But based on the information given, we can deduce that option A) Approximately 6 to 9 weeks is the correct answer. The correct option is A.