Answer:
D) All of the above
Step-by-step explanation:
A good perpetual inventory system doesn't require a physical inventory count, not because it is not useful, but because it is not worth it. The benefits that can be obtained through a physical count are much less than the costs of doing so, e.g. big corporations like Amazon or Apple probably will never carry out a physical inventory count.
The reason why a physical count is not needed is because a good perpetual inventory system provides a very high control level over the inventory and is continuously updated.
Even smaller firms cannot afford to carry out a physical inventory count, imagine a supermarket having to close for a full week in order to count the products. Besides the actual cost of counting goods, the lost revenue due to shutting down operations.