I basically konw the answer but I also need explanations on why the answer is correct. If a question requires a numerical answer, provide a formula that helps to solve it.

RELATIONSHIPS 1. Selling a stock after a sufficient period of time so that the gain is long-term instead of short-term taxes. 2. Realizing a capital loss to offset a capital gain taxes. 3. Selling a stock for a gain and immediately repurchasing the shares the tax on the gain. 4. Selling a stock for a short-term loss and immediately repurchasing the shares the tax benefit from the loss. 5. Contributions to a traditional IRA current income taxes. 6. Withdrawals from a Roth IRA income taxes. 7. Distributions from a defined contribution pension plan taxes. 8. An increase in current income tax rates the attractiveness of a Roth IRA. 9. The expectation of higher income tax rates the argument to prefer a traditional to a Roth IRA. 10. A change in long-term capital gains tax rates the taxes owed on a traditional IRA distribution