Detailed Instructions: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Problem:[header] How to floor an attic [title] Call professionals to determine if your ceiling can carry the load. [step] You must make sure that your ceiling trusses will be able to handle the load of the new floor and the weight from storage or people walking around. Call contractors in your area and get multiple quotes for adding a floor. <sep> (A) This will give you an idea of whether you'll need to make structural changes before you can add the floor. [substeps] Adding a new floor to weak attic trusses may interfere with the structural integrity of your house and can cause your ceiling to cave in. (B) [substeps] If the ceiling trusses are incorrectly anchored or unsupported they may not do the job. Call building companies for advice or " needs, " instead of contractors who may require multiple quotes. (C) [substeps] An excess of 4 by 6 inches drop from the ceiling, as well as correctly placed can be a significant and costly cost, reducing your costs. For example, if your only floor is 4 by 6 inches, then 4 by 4 feet may cost a buck. (D) Your contractor should be able to provide significant expertise and knowledge. [substeps] It is impossible to know if your room ceiling is a fault unless looking at room maps and several measurements of walls, sinks, and rooms, respectively, see them as you measure.
Solution:
A