Final answer:
The nursing student who understands the precautions needed in the provision of care to an HIV-positive child knows to put on gloves when in contact with body fluids.
Step-by-step explanation:
The nursing student who indicates an understanding of the precautions needed in the provision of care to a child who is HIV positive is the one who says, "I'll put on gloves if I'm going to be in contact with body fluids."
This statement shows awareness of the need to protect oneself from potential exposure to HIV by wearing gloves, which is necessary when coming into contact with body fluids that may contain the virus.