Many customers said they had a chance to eat and drink in a cleaner environment.
Answer:
im pretty sure the answer is D
what to do can you tell me in comments and i will edit it.
Answer:
I believe that The word 'Validate' in this sentence would mean to clarify what the first one is saying.
Explanation:
If you get results from the first "experiment" then the second experiment's results will clarify, or prove what the first experiments answer was
