Given the task definition and input, reply with output. 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 remove rivets [title] Grind off as much of the rivet's head as possible with a grinder and grinding wheel. [step] Take care not to grind into the metal around the rivet. [title] Use a small punch and a hammer to drive the pin down part way through the rivet. <sep> (A) [title] Follow the alternative approach of grinding up just half the head. [step] Boiling your chip down gradually will allow the layers of rivet to come out readily, much like peeling off frozen ice cream. (B) [step] Note that this style of rivet does not have a hammer. [title] Scrape the rest of the rivet off using a tool like a knife. (C) [step] You may have to break it off more to slide it through. [title] Locate the pin inside the rivet to give your machine a tighter seal. (D) [step] This creates a starter hole that will help to guide the drill bit. [title] Select a drill bit a size smaller than the rivet.
D