Which of the following reasons completes the proof in line 2? a.) definition of parallelogram. b.)if both pairs of opposite sides are =, then a parallelogram. c.) all quadrilaterals are parallelograms.

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.