You are presented with the question "what can cause headaches" and the following answer choices: 
- cloudy and rainy weather
 - hyperthyroidism
 - prolactin release
 - Damaged hearing
 - The bending of a ray of light
 - Leptospirosis
 - Warm air moving into cold air
 - looking at bright objects

Now knowing that looking at bright objects has a negative impact on the eyes and eye and dental disorders sometimes cause headaches, choose the best answer.


 

        looking at bright objects 