it would be choice C. the higher the numbers are, the more basic the solution is and vise versa (the lower the numbers are, the more acidic the solution is). in this situation, we are focusing on specifically black coffee. according to the pH scale, black coffee has a pH level of 5, meaning it’s neutral- in the middle.
choice C makes the most sense because urine has a pH level of 6 while black coffee has a pH level of 5. since urine has a slightly higher pH level, this means it’s more basic than black coffee or black coffee is more acidic than urine
