the options are as follows
A. Nikki adds a deletion feature to her application. In testing, she discovers that the creation feature no longer behaves as expected.
B. Before Nikki makes any changes to her app, a blogger discovers a bug in the reading feature.
C. Nikki writes a new test, which is failing.
D. Nikki decides to replace updating with deletion. She adds a deletion feature and removes the updating feature.
However, None of the given scenarios can be considered as an example of regression.
Regression refers to a software bug where a previously working feature of an application stops functioning correctly after a new update or change has been made to the code. It occurs when changes made to the codebase unintentionally affect the existing functionality of the software.
Option A talks about a bug in the creation feature when Nikki adds a deletion feature. This is an example of a functional bug and not regression.
Option B refers to a bug in the reading feature. This is also an example of a functional bug, not regression.
Option C refers to a failing test, which could indicate a bug in the application, but not necessarily regression.
Option D talks about replacing updating with deletion. This is a planned change in the code and does not indicate regression.
Therefore, none of these options provide an example of regression.
Am I missing something here?