The Demand for Dishwashers Facing the AllClean Co

The demand for dishwashers facing the AllClean Co.is given in the figure above.The firm manufactures dishwashers in two plants.MC₁ and MC₂ are the marginal cost curves for those two plants.How should the firm allocate total output between the two plants in order to maximize profit?

A) 10 to plant 1,40 to plant 2
B) 20 to plant 1,30 to plant 2
C) 40 to plant 1,40 to plant 2
D) 20 to plant 1,60 to plant 2
E) 20 to plant 1,50 to plant 2