People aged are the most entrepreneurially active in the united states. a option
a.25'34 b option
b.55'64 c option
c.45'54 d option
d.75'84

I am answering based on observation, researchg, but I'm not an expertise in this field of study. My research suggests option D because these ages are more financially stable at this time in life. 86% of them have stable jobs, good benefits, grown children, or still single and focused primarily on their high paying, busy occupations. They prefer to be single (married to work) and have the means to take "educated" risks.
My first thought was A because the younger generation are more likely to take risks, but do not have the financial means to survive living this way unless they come from a family of wealth, or win the lottery.
82.5% between the ages of 25 to 34 are getting out of college, focused on finding jobs with benefits, getting married, and having kids. More focus is on making a living and raising a family.