The correct answer is - C. A people's whole way of life.
A culture represents the characteristics, and knowledge of a particular group of people, and in it are included the language, social habits, cuisine, religion, arts, music etc. Every culture is defined by its own unique traits, and those traits have been developing for decades, centuries, even millenniums among certain group of people. There are thousands of different cultures around the world, and they are all wonderful and interesting in their own specific way.