Johnston Controls began operation in 2014 using FlFO inventory methods. In 2015, management decided they should have chosen LIFO to more accurately portray financial position and performance. The beginning 2015 inventory using FiFO was $100,000. Under the LIFO method the beginning inventory would have been $120,000. The adjustment to inventory for the accounting principal change for 2014 would be O A. $20,000 credit O B. $20,000 debit O C. S0 O D. $10,000 debit