With regard to the retail inventory method, which of the following is the most accurate statement?

a. Generally, accountants exclude net markups and include net markdowns in computing cost price percentage

b. It is not adaptable to FIFO costing

c. This method results in a lower ending inventory cost if net markups are included but net markdowns are excluded in computing the cost price percentage

d. Generally, accountants ignore net markups and net markdowns in computing the cost price percentage