The pH will decrease because lemon juice is very acidic meaning it would bring the pH level down to a more acidic value.
Answer:I’m not sure but I think it is the last one
Explanation:
A scientific theory may be revised overtime because it goes to the loop of science which what's the scientific theory to test several times each time a different product may be shown or every now and then a different product may be shown so therefore over time as it goes through the loop of science a scientific theory may change or be revised
