Amanda is making pastry dough. she mixes 1/3 of a cup of flour and 1/5 of a cup of sugar. if she wants to mix flour and sugar in the same ratio to make 16 cups of pastry dough how many cups of flour and sugar will she need.

oa. 12 cups of flour and 4 cups of sugar
ob. 10 cups of flour and 6 cups of sugar
oc. 11 cups of flour and 5 cups of sugar
od. 9 cups of flour and 7 cups of sugar
need