Q: 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".
[header] How to clean old cast iron [title] Scrape the rust off with steel wool. [step] Apply force to the steel wool as you wipe back and forth to remove all of the rust. The dry rust should begin to peel and flake off. <sep> (A) Continue to do this until you expose the raw cast iron under the rust. [title] Wash the cast iron with hot water and dish soap. (B) Continue scraping away the rust until the area is free of bits or chips. [title] Take out the rust with a tin brush, and clean out the inside with a rag. (C) Be gentle as you do this as you do not want to damage the wood. [substeps] Keep the steel wool back, so that its surface isn't touching the glue or caulk on your cast iron. (D) A metal polishing rag or dish rag is ideal for this job. Remove as much of the rust as possible, then clean the whole piece with steel wool.
A:
A