Definition: 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".
Input: [header] How to buy pet training supplies [title] Visit the pet store. [step] Go to your local brick-and-mortar store are browse the shelves for possible training items. The stores are generally organized according to animal so you should have little difficulty finding the section that you need. <sep> (A) [title] Know your need for training or purchasing materials. [step] Learn the proper types of supplies, and research the requirements before proceeding with your training process. (B) [substeps] Look in the follow guide to find a pet store that specializes in training, however you want to make sure that the store does not possess pet equipment that could cause injury or harm. [title] Make sure that they offer the required training. (C) Ask store workers about items that they would recommend or avoid. [substeps] One way to get an extra level of insight is to ask workers, " what training items are frequently returned and why? " this tells you the training supplies that you should generally avoid due to the high level of customer dissatisfaction. (D) [substeps] Pet stores offer places to buy training supplies and staff, so ask if there is a complete list of supplies before buying them. Many stores are privately owned so they cannot charge.
Output:
C