Give the amortization method(s) described by the following statements:
a. Amortization Expense declines over the life of the asset
b. Book value declines over the life of the asset
c. Amortization expense fluctuates with use
d. Amortization expense is the same each period
e. This method best fits an asset that amortizes because of physical use
f. This method best fits an asset that generates revenue evenly each period
g. This method is the most common
h. This method records the most amortization over the life of the asset