Answer:
a) Weight
Explanation:
According to my research on studies conducted by various medical professionals, I can say that based on the information provided within the question this test should be adjusted based on the persons weight. This is because a bigger person would have more quarts of blood in their body and thus be less affected by a certain amount of alcohol as a person that weighs less. It is said that the amount of blood in a persons body is about 7% of the individuals body weight.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.