Answer:
B. debit to WIP inventory
Explanation:
The journal entry to record the usage of direct material in production is
Work in Process Inventory Dr.
To Raw Material Inventory
(Raw materials consumed recorded)
Raw material inventory is an asset. It's consumption should reduce it's balance. A debit increases an asset's balance while a credit reduces it's balance.
Work in process, like raw material is an inventory account i.e an asset. A debit increases their balance whereas a credit reduces it.
Here, raw materials i.e direct material have been issued for production, which would reduce their balance and increase the balance of work in process as finished goods are yet to be made.