Final answer:
The entries to record the sale of bonds will include the market value at the time of sale and the gain or loss on the sale, but not the initial cost or future interest payments.
Step-by-step explanation:
When an investment in bonds classified as trading securities is sold, the entries to record the sale would include B. the market value of the bonds at the time of sale and C. the gain or loss on the sale. The initial cost of the bonds, choice A, is relevant for calculating the gain or loss, but it is not directly included in the entries.
The future interest payments on the bonds, choice D, are not included because they are not realized by the seller once the bonds are sold and are therefore irrelevant for the entries of the sale transaction. The gain or loss on the sale is calculated as the difference between the market value at the time of the sale and the initial book value of the bonds.