The correct answer is B.
An environmental factor refers to an external influence present in your environment, so in this case it would be poverty. Poverty can contribute to mental illness as it can be very emotionally as well as physically destructive to live in poverty. Also those living in poverty are least likely to get any help for their health as they are unable to. Intelligence and high self esteem would be personality/cognitive factors and a supportive family would be a social factor.
