Answer:
In a case in which a seller is carrying on an auction but the photographs of the product take too long to load and the potential customers leave the webpage before they load, the seller must have been unaware of the:
eight seconds rule
Explanation:
The reasons behind this answer are that the eight seconds rule is the concept to define the amount of time humans usually spend in observing something. In other words, it is the number of times humans have as the span of their attention. Therefore, if the object we want to show to our public can't be understood in eight seconds we are not going to engage them.