Answer:
a.It recognizes that the work and costs carried over from the prior period legitimately belong to that period.
Explanation:
Under the FIFO method, all the units which are completed first are sold first. Basically it do not account for the opening work in progress as related to current year, rather it states the expenses related to previous period belong to that period only.
Thus, it states that the goods belonging to some previous period are because of expenses incurred in previous period.
Statement A which clearly states that the goods or work in process carried from previous period do belong to that period, and not to the current period .