GIVING BRAINLIEST TO FIRST GOOD ANSWER WITH STRONG SUPPORTS! NOT THAT HARD Which is a correct method used in a scientific experiment involving acid and base solutions? (2 points) Select one: a. Using a pH test strip to measure the oxygen content of a solution b. Adding an indicator to a solution to test its acidity c. Adjusting the recorded pH measurements to prove the hypothesis d. Measuring the pH of a test strip by dipping it into an indicator