The things that most strongly influence your personality are your environment, your genes, and your experiences. It has been shown in studies that the environment and our genes both play an important role in determining what oulr personality would look like. However, what we experience personally also affects how we will behave and what kind of personality we will have. For that reason it's a combination of the three.
The correct answer is C. Mirror.
When a person performs an action, the neurons which are activated and then sees another performs action are referred to as mirror neurons.
Mirror neurons are essential for imitation which is the known key for learning process. They are important because they help in planning our understanding and intentions which are behind actions.
They allow us to interpret an action. For example, it helps the cells in the brain to perform when a certain action is being performed.