In a predictive model for sales, what does the quotation conversion rate measure?

In a predictive model for sales, what does the quotation conversion rate measure?
A . The percentage of the net value of billing documents that was converted from quotations
B . The percentage of the number of orders that was converted from quotations
C . The percentage of the net value order items that was converted from quotation items
D . The percentage of the number of order items that was converted from quotation items

Answer: B