Which of the following statements is true?

The correct answer is inclusive of all the statements because each one accurately describes a different model of data pricing that can be employed by service providers.

Usage-based pricing takes into account the total amount of data a user consumes, charging them based on the volume of data used. This model is often used in telecommunications and cloud services, where customers pay for what they actually use, rather than a flat rate.

Time-dependent pricing refers to the concept where the cost of using data can vary based on the time of day. This can be particularly relevant in scenarios where network congestion is higher during peak hours, leading providers to incentivize usage during off-peak times by offering lower rates.

Location-based pricing utilizes the geographic location of the user to determine pricing. This can reflect differences in infrastructure costs or local market conditions, allowing providers to set rates that reflect the varying costs of delivering services to different areas.

Thus, since all these pricing strategies are valid and represent different methodologies for charging customers for data consumption, stating that all of the above options are true encapsulates the various approaches effectively.