$10.$ Bob is $30$ years old. As a student, Bob majored in fine arts and was a competitive skier. Which of the following is more probable?

a$)$ Bob works as an accountant

b$)$ Bob works as an accountant and volunteers for the local ski club

c$)$ Bob works as an accountant and volunteers at the local art gallery

d$)$ Bob works as an accountant and is an avid chess player