To answer this question, the user needs to have basic knowledge about the definition and characteristics of culture.

Option A is incorrect because languages are not cultures. A language is a system of communication, while culture is a complex set of learned behaviors and beliefs. Although a language can be an important aspect of a culture, it is not a culture itself.

Option B is incorrect because archaeologists do not dig up culture. They may excavate artifacts and other physical remains that provide evidence of past cultures, but culture itself is intangible and cannot be directly excavated.

Option C is correct. Culture refers to the shared beliefs, values, customs, behaviors, and artifacts that characterize a group or society. It is a powerful tool for human survival because it enables individuals to collaborate and cooperate with each other, share knowledge and resources, and pass on information and skills from one generation to the next.

Option D is incorrect because not all of the above statements are true. Only option C is true.

Therefore, The Answer is: C