Final answer:
Catherine and her team should adjust the camera's aperture to ensure that the image is not too bright.
Step-by-step explanation:
To ensure that the image is not too bright when shooting an outdoor scene on a sunny morning, Catherine and her team should adjust the camera's aperture. The aperture is the opening in the lens that controls the amount of light reaching the camera's sensor. By adjusting the aperture to a smaller size, less light will enter the camera, resulting in a properly exposed image.