The operating budget is

a budget for day-to-day expenses

spending on certain programs that is mandated, or required, by existing law

a budget for major capital, or investment, expenditures

a budget in which revenues are equal to spending

The operating budget is a budget for day-to-day expenses.

Option A

Explanation:

An operating budget includes all revenues and spending over certain period of time that may be either a quarter or a year that is planned by the government or an organisation that uses to organise its operations.  

This type of budget is developed in an advance to a period of reporting in accordance with expected goals of an organisation.  

The major components of operating budget includes the following  measures such as Fixed Costs, variable costs, Revenues, Non-cash expenses, Non-operating expenses, Capital costs.