Final answer:
The reported result would be 24.0 mmol/L.
Step-by-step explanation:
To find the reported result, we need to consider the dilution factor. A 1/6 dilution means that the original concentration was 6 times higher. So if the result after the dilution is 4.0 mmol/L, the reported result would be 4.0 mmol/L x 6 = 24.0 mmol/L.
Therefore, the correct answer is A) 24.0 mmol/L.