Final answer:
The best direct care intervention for a cognitively impaired client's need for social interaction is to arrange for them to attend a sing-along, providing active engagement and interaction with others.
Step-by-step explanation:
The intervention that best reflects the nurse's understanding of direct care interventions regarding a cognitively impaired client's need for social interaction is arranging for the client to attend a "sing-along" in the dayroom. This option actively engages the client in a social activity that encourages participation, interaction with others, and potential cognitive stimulation through music, which can be especially beneficial for those with cognitive impairments. Other options like assisting with a phone call, turning on the television, or discussing sports while providing care are valuable interactions but do not provide the same level of social engagement and active participation as attending a group social event. Social interaction is important for individuals with cognitive impairments as it can help maintain or improve social skills and contribute to a sense of belonging and well-being.