What Is an "Operating" Cycle

What is an "operating" cycle?

A) A cycle of transactions that converts cash inflows to cash outflows, or vice versa.
B) A cycle where there is receipt of funding from investors, those funds are used to generate returns from investments and operations, and then the funds are returned to investors.
C) A cycle where a property is purchased that has long-term future benefits for the enterprise, which ultimately results in cash inflows, and then the property is disposed of.
D) A cycle that involves the purchase of items such as inventory; production, sales, delivery of goods or provision of services; and receipts from customers.