PART A: In paragraph 40, the text says, "the 'username' for each medical file is the child's fingerprint."
Which of the following best explains the meaning of this statement?
A. The child's vaccination record is labeled with a picture of their fingerprint.
B. The child's vaccination record also contains information about their fingerprint.
C. The child's fingerprint is the only way they can be vaccinated.
D. The child's vaccination record is directly linked to their fingerprint.