why is evolution called a scientific theory?

The most accurate answer is:

**C: There is lots of evidence to support it.**

A scientific theory is a well-substantiated explanation of some aspect of the natural world that is based on a body of evidence and has stood up to repeated testing and scrutiny. Evolution is called a scientific theory because it is supported by a large amount of empirical evidence from various fields, including genetics, paleontology, and comparative anatomy. While other aspects like testability and acceptance by the scientific community are relevant, the core of a scientific theory is its evidential support.