Final answer:
The estimated turnaround time for receiving a mailed packet after placing an online order for educational materials might be closest to option D) 14 or more business days, referencing historical context. However, current practices usually suggest shorter delivery times unless extraordinary circumstances apply.
Step-by-step explanation:
When placing an online order for educational materials, the estimated turnaround time to receive a mailed packet can vary greatly depending on various factors, including the shipping method chosen, the originating location of the package, the destination, and the efficiency of the postal or delivery service. Based on the information provided, with references to an average time of forty-five days reported by Willcocks (1913) and other variable durations mentioned by Barois (2010), option D) 14 or more business days seems like the closest and most realistic option for an estimated turnaround time. However, these references are quite dated, and the actual turnaround time could be different in current practice.
It's essential to consider that the given references do not precisely align with modern shipping standards, hence when ordering educational materials today, it is more common to see turnaround times ranging from a few business days to a week or two, unless there are exceptional circumstances that could delay delivery.