Which of the following statements is true?

A. A taxpayer can carry back net operating loss (NOL) 2 years and then forward up to 20 years

B. If a taxpayer sells Section 1244 stock at a loss, all of the loss will be ordinary loss.

C. The amount of loss for partial destruction of business property is the decline in fair market value of the business property.

D. Loss is not allowed for a security that declines in value.

E. A loss deduction from a casualty of a business asset is only available if the asset is completely destroyed.