Suppose a firm is currently selling three similar products with identical demand distributions but different demand correlations among them. The firm is considering designing a universal product that would replace all three of them. The firm will achieve savings in inventory

Group of answer choices

only if at least two of the products have negatively correlated demand.

only if demands for all three products are positively correlated.

only if all demand correlations are different from zero.

only if all demand correlations are different from $-1.$

only if all demand correlations are different from $1.$