Final answer:
The impact on the financial statements before the interest payment is an increase in Liabilities and a decrease in Equity.
Step-by-step explanation:
The impact on the financial statements before the interest payment is an increase in Liabilities and a decrease in Equity (Option A).
When Sierra Corporation signed the note payable, it created a liability on its balance sheet. This increased the liabilities of the company. At the same time, there is no impact on the company's assets, so there is no increase in assets or equity.