Which of the following is (are) conjugated dienes? 
Definitions:
Income Before Taxes
The amount of revenue left after deducting all operating expenses, interest, and depreciation, but before paying income taxes.
Straight-Line Method
A depreciation technique where an equal amount of depreciation is charged for each year of the asset's useful life.
Semiannual Interest
Interest that is calculated and paid twice a year, often used in the context of bonds and loans.
Effective Interest Method
An accounting practice used for calculating the amortized cost of a bond and the interest expense over the bond's life based on the effective interest rate.
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