Final answer:
Ammonia has a higher pH than water and vinegar.
Step-by-step explanation:
The pH scale measures the acidity or alkalinity of a substance, with a range from 0 to 14. Pure water has a pH of 7 and is considered neutral. Acids have a pH lower than 7, while bases have a pH higher than 7. Vinegar is acidic, typically with a pH around 2-3, while ammonia is a weak base with a pH around 11-12. Therefore, option C) Ammonia has a higher pH than water and vinegar, best represents the relationship between the pH of water, vinegar, and ammonia.