Final answer:
Richard and Kathy can predict each other's behavior with high accuracy due to their close friendship.
Step-by-step explanation:
The MOST accurate statement regarding Richard and Kathy's ability to predict each other's behavior is option a) They can predict each other's behavior with high accuracy due to their close friendship.
Close friendships often involve a deep understanding of each other's personalities, preferences, and habits. Through years of being best friends, Richard and Kathy have likely developed an intuitive sense of how the other person is likely to behave in different situations. This level of familiarity and knowledge allows them to make accurate predictions about each other's behavior.
For more complex tasks or situations, their predictions might not be as accurate as for simpler ones, as complexity can introduce more variables and uncertainties. However, overall, their close friendship gives them a strong foundation for predicting and understanding each other's behavior.