Question 5Which of these is a user requirement?1 pointUse the MariaDB database for internal data persistanceAllow the user to post a message to FacebookAllow an authorized user to post a message of no more than 136 characters to the Facebook POST APIRetry posting the message up to 3 times every 5 minutes if the post is rejected by the server

The user requirement from the options given is: "Allow the user to post a message to Facebook".

Here's why:

User requirements are statements about what the system must do or provide for the user. They are focused on the needs, goals, and tasks of the user, and they are typically written from the user's perspective.

1. "Use the MariaDB database for internal data persistence" - This is a system or technical requirement, not a user requirement. It's about how the system should be built, not what the user needs from the system.

2. "Allow the user to post a message to Facebook" - This is a user requirement. It's something that the user needs to be able to do with the system.

3. "Allow an authorized user to post a message of no more than 136 characters to the Facebook POST API" - This could be seen as a user requirement, but it's more of a system requirement because it's about how the system interacts with the Facebook API, not about what the user needs from the system.

4. "Retry posting the message up to 3 times every 5 minutes if the post is rejected by the server" - This is a system requirement. It's about how the system should behave under certain conditions, not what the user needs from the system.