Which Characteristic of an Attractive Professional Persona Has the Writer

Which characteristic of an attractive professional persona has the writer of the following excerpt NOT shown?
As you probably already know, we have a problem with our current documentation. Users cannot easily locate the serial numbers necessary to complete the online registration step. The solution below will help us address this problem and eliminate the customer-support calls we get. It will also solve a few other problems. Last week, others suggested different solutions. However, I know they will not work. The best course of action is to prominently display the serial numbers at the start of the chapter labeled "Registering Your Product." Our users expect to find the numbers in this chapter.

A) cooperativeness
B) moderation
C) fair-mindedness
D) modesty