Preference file is causing the app to crash at launch

A technician suspects that an application preference file is causing the app to crash at launch. Which of the following techniques would be best to confirm the issue?
A. Use a Time Machine backup to restore the entire User folder.
B. Delete the application, reinstall it, then try launching it again.
C. Startup from the Recovery HD, open Disk Utility and repair the startup disk.
D. Press and keep pressed the Option key on the keyboard. From the “Go” menu of Finder, choose “Library”, move the suspected preference file to the desktop and then try launching the application.
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