He taught himself math, and was a maker of almanacs, an astronomer, and an author. Need to know more? Go here : http://www.biography.com/people/benjamin-banneker-9198038
I believe it's B, parentheses.
Comment the correct answer.
Each roll is independent to the others, and there is a 1/6 (16.7%) chance that a 6 is rolled. so you multiply each roll's probability together:
1/6 x 1/6 x 1/6 x 1/6 = 0.00077
