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 drill holes on an engine lathe using the carriage [title] Attach the chuck to the lathe according to the manufacturer's instructions. [title] Loosen off the chuck, mount your work into the chuck and then re-tighten the chuck. [title] Select your tooling and speeds and feeds. <sep> (A) [title] Put the base bush on with the cleat you have selected. [title] Drill out small ball holes into the cleat, at various lengths. (B) [title] Mount a lathe center in the tailstock. [title] Place the drill with the square split bushing into the tool post and shim or adjust to ensure that the drill center lines up with the lathe center. (C) [title] Set the grinder's range appropriately. [title] Use the drill, paddle head and steel grinders to till the cut marks are spotless and clean. (D) [title] At the high end, drive the chuck until the engine spool and hose combine and the grill heat needs to reach the pan. [title] Remove the lens and screw it back in using the outer snap plate.
Student:
B