1. Beiwang Company is a large and medium-sized enterprise with strong seasonality and AA grade credit. When the production and operation peak season comes each year, the enterprise faces the problem of short supply of products and serious shortage of funds, which makes the company leaders and financial managers very troubled. . In 2012, the company also encountered this problem. The type A materials needed in the company's production were in short supply and urgently needed 2 million USD in capital investment. The company currently has no excess funds. If this problem is not resolved, it will have a serious impact on the company's production and its benefits for the year. To this end, the company leaders asked the financial manager JACK to come up with a solution as soon as possible. After receiving the task, JACK will immediately discuss countermeasures with other financial personnel of the company to alleviate urgent needs. After some discussion, four alternative financing schemes were formed.

Option 1: Bank short-term loans. ICBC provides a short-term loan of 2 million USD with a term of 3 months with an annual interest rate of 8%, and the bank requires a 20% compensatory balance to be retained.

Option 2: Bill discounting. Unexpired (non-interest-bearing) commercial bills with a face value of 2.2 million USD were discounted 3 months in advance. The annual discount rate is 9%.

Option 3: Commercial credit financing. Tianlong Company is willing to sell 2 million USD of A materials to it under the credit terms of "2/10, n/30".

Option 4: Arrange someone to call back the 2.5 million USD receivable.

Beiwang's product sales margin is 9%.

Please help Financial Manager Jack to choose the short-term fund raising method of Beiwang Company.Explain why