When specifying border-width, you can use keywords (thin, medium or thick) or specify a value in pixels. 

You attempt to install the package "oped.8.7.6-12-x86_64.rpm" on a server. Even though the package was downloaded from the official repository, the server states the package cannot be installed because no GPG key is found. What should you do to allow the program to be installed?

A. Verify the hash using SHA. B. Verify the hash using MD5. C. Import the repository's public key. D. Import the repository's private key.

The external documentation is:

a. Written for the developer. b. Written for the user. c. Written to clarify the logic of the program. d. All of the above.