The bulk food section of a grocery store has two bins with different types of mixed nuts. the first bin contains walnuts, peanuts, and pistachios. the second bin contains pecans, almonds, brazil nuts, and walnuts. which set represents all types of nuts in both bins?

a) {walnuts, peanuts, pistachios, pecans, almonds}

b) {walnuts, peanuts, pistachios, pecans, almonds, brazil nuts}

c) {walnuts}

d) {peanuts, pistachios}