The financial statement(s) that record activity over an interval of time include thea. income statementb. balance sheetc. balance sheet and income statementd. income statement and statement of cash flows.

D. Income statement and statement of cash flows.

Explanation:

Balance sheet: In the balance sheet, the assets, liabilities, and stockholder equity is recorded. In this the accounting equation is used which is shown below:

Total assets = Total liabilities + stockholder equity

The debit and credit side of the balance sheet should always be equal and balanced.  

Moreover, it always is prepared on the specified date.

Income statement: In the income statement, the total revenues and the total expenses are recorded.  

If the total revenues are more than the total expenditure then the company earns net income

And, If the total revenues are less than the total expenditure then the company have a net loss

This net income or net loss would reflect in the statement of the retained earning account.

Statement of cash inflows:

Basically there are three types of activities:

1. Operating activities: It includes those transactions which affect the working capital, and it records transactions of cash receipts and cash payments.

2. Investing activities: It records those activities which include purchase and sale of the fixed assets

3. Financing activities: It records those activities which affect the long term liability and shareholder equity balance.  

These two above statements i.e. income statement and cash flow statement record the activity over a time interval.  

Thus, rest options are incorrect except C.