Final answer:
A supportive network option (c) is generally not considered a source of stress according to researchers Boyd and Gumpert, unlike financial pressure, role conflict, and time constraints which are typical stressors.
Step-by-step explanation:
According to researchers Boyd and Gumpert, the source of stress that is not usually considered is a supportive network. Typically, financial pressure, role conflict, and time constraints are acknowledged as major sources of stress, as they can compromise an individual's sense of well-being and can be perceived as overwhelming or threatening to their welfare.
On the contrary, a supportive network, which includes positive relationships with friends and family, generally serves to mitigate stress rather than cause it. Although, it is important to note that certain aspects of these close relationships, especially when they are negative, can indeed become potent stressors.