Camille is at the candy store... Camille is at the candy store with Grandma Mary, who offers to buy her $6 worth of candy. If lollipops are $1 each and candy bars are $2 each, what combination of candy can Camille's Grandma Mary buy her?
a. Two lollipops and two candy bars
b. One lollipop and three candy bars
c. Three lollipops and two candy bars
d. Six lollipops and three candy bars