Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to measure stair stringers [title] Determine the overall height of the stairs. [step] Extend a level out across the upper edge of the deck or porch (or the entry point, if you're building stairs for a shed or similar structure). Stretch your tape measure from the bottom of the board to the ground. <sep> (A) [substeps] Note that using a tape measure on stairs is a common-instinct in the engineering world where experienced construction workers are always willing to stand if needed. [title] Measure the length of each stair at the height of the slope (not the upper edge, if it has greater stairs). (B) [substeps] Make sure your tape measure is also at least 38 in (41 cm) from the bottom edge (for a shed or similar structure). You can also use great gauge tape which can be purchased at a hardware or home improvement store. (C) This will tell you exactly how high the new stairs will reach. [substeps] The stringers are the notched, sloping boards that will go on either side of the stairs to hold the steps and support the weight that's placed on them. (D) How high you get depends on the roof of your house. [substeps] If you're building stairs for a shed, it should be at least about a meter high.
Student:
C