Fact 1: Vinegar can cause harm to the eyes.

Fact 2: Vinegar, battery acid, and wine are acids.

Given the two facts above, answer the question "What can cause harm to the eyes?" with the following options: 
- mildew
 - normal water
 - Herpes
 - normal air
 - coal
 - mold
 - acid
 - contact solution


 

       acid  