Answer:
a. True
Explanation:
True because the blue tube has an additive called citrate, these additives when changing from one tube to another there is the possibility that they contaminate the next tube in the order of filling with their additive, this can alter the parameters we want to measure, for both by following these filling order strategies, the aim is to reduce the possibility that one tube is contaminated with the additive of another and in this way that the parameters are not altered
