Fact 1: Vinegar can cause harm to the eyes.

Fact 2: Vinegar is a weak acid (3.5 pH).

Given the two facts above, answer the question "What can cause harm to eyes?" with the following options: 
- Water
 - Alcohol
 - Eye drops
 - Saline
 - mildew
 - mold
 - coal
 - Acids


 

        Acids 