Final answer:
The percentage of Americans experiencing stress from daily discrimination is not explicitly stated, but given that almost half report increased stress levels, it's likely significant. Discrimination is known to be a major stressor with adverse health effects.
Step-by-step explanation:
The question asks about the percentage of Americans who claim to experience stress in the form of daily discrimination. While the options provided are a) 20%, b) 35%, c) 50%, and d) 65%, the information given does not directly answer this question. However, we can infer that stress due to discrimination may have contributed to the increasing stress levels reported in the U.S. population, as nearly half of U.S. adults indicated their stress levels have increased over the past five years according to Neelakantan (2013). Moreover, discrimination as a stressor is highlighted by Pascoe & Smart Richman (2009), noting its negative impact on physical and mental health in marginalized groups.