Final answer:
Pre-set widget filters can be customized, come with default settings, and are user-friendly.
Step-by-step explanation:
Of the statements given, the one that is not true of pre-set widget filters is b. They cannot be modified.
Pre-set widget filters are customizable as mentioned in option a, allowing the user to modify them based on their specific needs.
They also come with default settings, as mentioned in option c, which means that they already have some preset values or configurations.
Lastly, pre-set widget filters are designed to be user-friendly as mentioned in option d, making them easy for users to interact with and use.