What will help reduce DSO?

Universal Containers’ DSO (Days Sales Outstanding) is at an all-time high, and they are evaluating way to shorten the collection time .

What will help reduce DSO?
A . Require Technicians log all non-billable hours.
B. Require customer signature on billable Work Orders
C. Require approval on all Installations.
D. Require Technicians sign-off on Work Orders.

Answer: D