Answer:
C. Six to eight times gently.
Step-by-step explanation:
The process of inverting a tube of blood after it has been drawn by a phlebotomist is known as mixing, and it is an essential step to ensure that the blood and any additives in the tube are well-mixed. Inverting the tube six to eight times gently is generally sufficient to achieve thorough mixing without causing hemolysis (rupturing of red blood cells), which can alter the results of certain laboratory tests. Shaking the tube vigorously or for an extended period of time could cause hemolysis and should be avoided.