Procter$$ & Gamble has found through a life cycle assessment$($LCA$)$ of laundry detergents that the use$($with consumers$)$ stage of the life cycle has$($by far$)$ the highest energy consumption compared to other life cycle stages for this product. Which of the following actions by$$ P&G would have the most beneficial impact in the$$ environment?$$

A$.$

Installing solar panels in the manufacturing facilities that manufacturers the laundry detergent

B$.$

Designing a laundry detergent package that is$10\%$ lighter.$$

C$.$

Sourcing laundry detergent raw materials from local suppliers

D$.$

Designing a laundry detergent that is as efficient to be used with cold water as with hot water