A. 4.0 – 4.5
B. 5.0 – 5.5
C. 6.0 – 6.5
D. 6.5 – 7.5

Correct Answer: Option D

D. 6.5 – 7.5

Explanation

The ideal pH of coffee is between 6.5 to 7.5. Therefore, choice D is correct.

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