Which of the following would be considered a proper expense in the reconstructed operating expense statement?

In a reconstructed operating expense statement, all the options listed—marketing costs, insurance, and maintenance—are considered proper expenses.

Marketing costs are included because they are essential for promoting the property and attracting tenants, thereby contributing to the property’s income generation. Insurance is a necessary expense as it protects against potential losses or damages, ensuring the property is safeguarded. Maintenance costs are critical as they encompass the ongoing upkeep required to keep the property in good condition, which directly impacts its value and desirability.

Including all these expenses provides a comprehensive picture of the property's operating costs, allowing for a more accurate assessment of its financial performance. Thus, the choice that encompasses all the options reflects a complete understanding of essential operating expenses in real estate appraisal.