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 make a guinea pig toy [title] Take a piece of string. [step] Depending on how tall your cage is, make the string is long enough for the guinea pig to reach it without hurting itself. [title] Find a carrot that is suitable for the guinea pig. <sep> (A) [step] Give it a wash and a quick dry. Poke a small hole in the middle of the carrot. (B) [step] This will be either pink or yellow. Make sure it's big enough for the guinea pig to stand up and move around on. (C) [step] It may be big enough and will have two legs. This will be the main part of the guinea pig's cage. (D) [step] Make sure the carrot is soft as using a pair of wire or thumbscrews can damage your guinea pig's delicate skin. [title] Cut the carrot in half lengthwise.
Solution:
A