Raysut Cement Company uses FIFO inventory valuation from Ist January 2017 to 31st December 2020.June of 2017 and from 1st January 2018 onwards, company changed method of inventory valuation from FIFO method to LIFO inventory valuation. Which of the accounting principles violate in the above case? O a Convention of Consistency O b. Convention of Full Disclosure O c. Accounting Period Concept O d. Convention of Conservatism