The MySQL server is highly configurable.

Answer: Option A

This question asks if the MySQL server is very flexible and can be changed in many ways.

The answer is True.
MySQL is known for having many settings you can adjust to make it work best for your needs. You can change things like:
* How much memory it uses
* How fast it responds to queries
* What kind of security measures it has
* And many more!

So, the answer is Option A: True.