How can a developer use Business Manager to ensure that the gift vouchers are always available?

A merchant wants customers to be able to order gift vouchers via their site. Since they can issue an

unlimited number of these digital vouchers, this item should be available to sell at all items.

How can a developer use Business Manager to ensure that the gift vouchers are always available?
A . Check the perpetual flag in the product inventory record
B. Check the Available to Sell (ATS) flag dor the producto set
C. Set StockLevel = maxAllocation for the producto.
D. Manually set the inventory to a high number.

Answer: A