All of these actions would be useful in order to help you read actively. Studying images and their captions can help you gain more insight into the topics discussed in the text. It can also help you create a visual image of these issues. Creating a mind map can help you better understand the connections between the ideas being discussed. Finally, trying to predict what will happen next will help you understand relations of cause and effect.
All the other options seem like good reasons but are not as important as improving your overall skills (from my perspective at least). Hope this helps!
