Outbound logistics is the process of storing, transporting and distributing goods to customers. The outbound logistics process starts with a customer sales order, moves on to warehouse packing and ends with product delivery. Mara Jos Lpez Len Gonzlez has an outbound logistics solution with an 80% probability of saving Walmart Inc.$100 million in a year in operating costs.Assume Walmart has $7 billion in net income and has a 20% marginal tax rate.What is the expected after-tax benefit of Mara's solution to Walmart?

A.$4 million

B.$16 million

C.$40 million

D.$64 million

E.$80 million