An accounting system spans which of the following Value Chain components?

Services frequently use differential pricing in an attempt to synchronize supply and demand. Hotels frequented by business travellers often offer discounts for weekend bookings. Cinemas have lower prices for matinee shows. This is a way to contend with which service characteristic?

a. intangibility b. simultaneous production and consumption c. perishability d. variability

The feature that enables multiple reviewers to critique a document and insert suggestions or questions is referred to as __________

Fill in the blank(s) with correct word