Isaac has decided to purchase several copies of a new children's book because he has a feeling that the availability of this book will be scarce in the future. Which of the following best explains Isaac's behavior?

A) Authority
B) Skepticism
C) Intuition
D) Empirical evidence

Empirical Evidence

Evidence that is based on observation, experience, or experiment, rather than theory or pure logic.

Intuition

The ability to understand or know something immediately, without the need for conscious reasoning.

Availability

The degree to which resources, services, or supports are accessible and obtainable when needed.