问题详情

What task was completed by the Devonshire Apartment Management Office in the past 3 months？
A．Purchasing new furnace systems for all tenants
B．Replacing furnace filters at no cost to residents
C．Improving the electrical wiring system in the office park
D．Installing new water faucets in every apartment请帮忙给出正确答案和分析，谢谢！