Final answer:
Researchers focused on the impact of telephone follow-up on the HRQoL in cancer patients during therapy, reflecting the importance of social support in treatment outcomes.
Step-by-step explanation:
The researchers investigated the influence of telephone follow-up on health-related quality of life (HRQoL) in cancer patients undergoing therapy. This translates to option D from the question, focusing on how telephone follow-up as a form of social support could potentially impact the well-being of individuals receiving cancer treatments.
Considering the noted significance of social relationships on health outcomes, as shown in the survival likelihood increase among individuals with stronger social ties, this research area is pertinent. Additionally, previous studies have highlighted the importance of psychosocial factors, including social support, in affecting health outcomes, making this investigation crucial regarding the management and care of cancer patients.