Answer: A. Customers’ personal information could be compromised if an unauthorized individual gains access to the call session database.
Explanation: Out of the options provided, A is the most likely data privacy concern of the upgraded system. The call session database is likely to contain sensitive personal information about the customers, such as their names, addresses, and phone numbers. If an unauthorized individual gains access to this information, they could potentially use it for nefarious purposes, such as identity theft or spamming. This could lead to serious privacy concerns for the customers.
Option B, while also a concern, is less likely to be the primary data privacy concern of the upgraded system, as it is generally more difficult for unauthorized individuals to acquire private encryption keys. Option C is a concern, but it is not directly related to the upgraded system and would be more of a general concern for any system that allows users to install software on their devices. Option D, while a concern, is not as likely to be the primary data privacy concern of the upgraded system as it relates to tricking the system using malicious links rather than accessing sensitive information stored in the call session database.