Answer all please!!

The credit standards of a firm are: O A. The period over which credit is granted. B. Procedures undertaken to collect overdue accounts. C. The guidelines used by a firm to decide who will get credit. O D. The length of the credit period and the discount offered. E. Both A and D Operating and financial leverage are caused by: O A. The presence of variable costs in a business. B. The use of resources which have fixed costs. C. he use of borrowed funds. D. The fact that sales will vary. to buy or sell designated securities or commodities at a specified during a stated An option is a which conveys the O A security, liability, price, option B contract, right, price, period OC. contract, requirement, price period OD. Biability, right, price, period