When It Comes to the Treatment of Amortization and Valuation

When it comes to the treatment of amortization and valuation of inventory,generally accepted accounting principles:

A) provide almost no guidance to accountants.
B) allow accountants to choose among different methods both for amortization and the valuation of inventory.
C) require accountants to use only one specific method of amortization,but permit several methods of inventory valuation.
D) require accountants to use one specific method for valuing inventory,but permit several methods for depreciating fixed assets.