1. The problem asks us to infer from the passage and the graph about the crow's behavior and performance on the obstacle course. 2. The graph shows a positive correlation between the number of obstacles completed and the time taken, indicating that as the crow completes more obstacles, the time increases. 3. Option (A) suggests the crow would take the same time without prior knowledge, but the graph and passage imply prior knowledge helped. 4. Option (B) states the crow’s prior knowledge factored into its ability to complete the course, which aligns with the inference that prior experience improved performance. 5. Option (C) claims the seed incentive did not affect completion time, but the passage implies motivation influenced eagerness and speed. 6. Option (D) suggests the crow’s eagerness would be the same with apple instead of seed, which is not supported by the passage. 7. Therefore, the best inference is (B): the crow’s prior knowledge of the course factored into its ability to complete it. Final answer: (B) the crow’s prior knowledge of the course factored into its ability to complete it.