Which one of these statements related to the recording of financial statement items based on GAAP is (are) correct?

The cost of salaries are recorded on the income statement when those wages are paid.

Expenses related to the production of a product are recorded on the income statement when that product is sold, not when the expenses are paid.

The cost of a fixed asset is expensed when payment for the asset is made.

Expenses related to the production of a product are recorded on the income statement when cash is used to pay those expenses.