-Refer to the Graphs Above to Answer This Question

-Refer to the graphs above to answer this question.Suppose that the price of nuts decreases from P₁ to P₂ and the demand curve for chocolates shifts to the right from D₁ to D₂.What is the relationship between nuts and chocolates?

A) The demand for nuts and chocolates must be unit elastic.
B) Nut and chocolates must be substitutes.
C) The cross-elasticity coefficient of demand for both nuts and chocolates must be positive.
D) Nuts and chocolates must be complements.
E) There is no relationship between nuts and chocolates.