The Following Data Apply to the Next Two Questions:Consider the Following

The following data apply to the next two questions:Consider the following open purchase order file in which each record contains the following fields:delivery instructionspurchase order datepart numberpurchase order numberquantity orderedunit pricevendor number
Consider the following open purchase order file in which each record contains the following fields:
delivery instructions
purchase order date
part number
purchase order number
quantity ordered
unit price
vendor number
-What would be the key for the new file created in Question 10?

A) Part number/quantity ordered
B) Part number/vendor number
C) Purchase order number/part number
D) Purchase order number/quantity ordered