RealPlan Sells a Calendar/messaging/paperwork Center That Helps Working Parents Organize

RealPlan sells a calendar/messaging/paperwork center that helps working parents organize their families' schedules and paperwork. The product has received positive feedback from buyers, and it is priced comparably to normal planners even though it offers more features and benefits. RealPlan has been selling various planning products to consumers for 10 years, and managers at the firm see an opportunity to move into the business market with a software version of the popular planner.
-Sarah,a RealPlan sales representative,recently sold a software package to Mario,the owner of a small business. How can Sarah most likely create value for Mario now that the sale is complete?
A)send Mario product brochures
B)become personal friends with Mario
C)continue to contact Mario to ask for referrals
D)provide additional software training to Mario
E)explain the many software benefits to Mario