Final answer:
Teaching the family proper handwashing technique is the most appropriate direct care nursing intervention for the identified nursing diagnosis of Risk for infection.
Step-by-step explanation:
The most appropriate direct care nursing intervention for the identified nursing diagnosis of Risk for infection would be a. Teaching the family proper handwashing technique. Proper handwashing is a crucial practice to prevent the spread of infections. By teaching the family proper handwashing techniques, they can minimize the risk of infection transmission to the patient and others.