A software developer claims that adding a brief delay before users can confirm a destructive action (such as deleting files) reduces the rate at which users mistakenly delete important data.
Which finding, if true, would most strongly support the developer's claim?
- A
Some software programs have multiple levels of undo.
- Bcheck_circle
After the delay was implemented, the rate of accidental file deletion among users dropped by 60 percent.
- C
Users tend to perform many actions per minute on average.
- D
Most users find brief delays mildly annoying.
Explanation
A directly measures the predicted outcome (drop in accidental deletions) after the intervention. B, C, and D are tangential.