Final answer:
In phlebotomy, the needle is typically inserted into the vein at an angle between 10 degrees and 30 degrees to minimize complications and ensure successful blood collection.
Step-by-step explanation:
In phlebotomy, the angle at which the needle is inserted into the vein is typically between 10 degrees and 30 degrees.
When inserting a needle into a vein, a shallow angle is used to minimize the risk of complications such as vein damage or hematoma formation. A steeper angle can increase the possibility of puncturing through the vein.
Therefore, the correct answer is either A. 10 degrees or C. 30 degrees.