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".

[EX Q]: [header] How to bathe a pregnant guinea pig [title] Select a shampoo. [step] There are all types of shampoos for pets. For your guinea pig, make sure the shampoo is made specifically for small animals (it should say so on the bottle). <sep> (A) Otc shampoos and chemical shampoos are good choices. Avoid shampoo labeled specifically for guinea pigs and those formulated for females. (B) This way, both animals can use the shampoo and their fur will be clean. While many shampoos claim to free your guinea pig from " reye's syndrome ", this actually isn't true. (C) [substeps] Make sure that it is specially formulated for pregnancy-therefore not designed for your guinea pig. You can get shampoo from the veterinarian. (D) A small animal-specific shampoo will keep your guinea pig's skin from drying out or becoming irritated. Since your guinea pig is pregnant, the shampoo should also be non-medicated to prevent ingredients absorbing through her skin that could harm her unborn babies.
[EX A]: D

[EX Q]: [header] How to travel abroad [title] Do your research. [step] You need to research where you are going, the flight times and prices for airlines, and which documents you need to take with you. Plan out your itinerary carefully. <sep> (A) Some cities, like london or paris, really need a week to see what they have to offer. Travel times also need to be taken into consideration. (B) For example, visit a couple of websites of airlines to see what type of itinerary they offer. Pay attention to the price, name, phone number and/or mailing address of each airline. (C) This will help ensure that all of your research enables you to see where you want to go. [substeps] Do research on an airline's website, and see what seat guides they offer on planes and what websites they provide online. (D) [title] Decide whether you will be flying from 1 area or from another. [step] International flights should likely be just a teaser.
[EX A]: A

[EX Q]: [header] How to buy school supplies [title] Get a list from your child's school. [step] Don't rely on your child for a list of what they need for school. If a list isn't available on the school's website, ask the teachers if they can send you a list or give you some ideas. <sep> (A) As a last resort, department stores sometimes have lists of common school supplies on their websites. [title] Know the difference between requests and requirements. (B) Your child might want a school bag or backpack to add its contents into, such as a backpack that holds their pencils, erasers, markers, or calculators. Look on the school's website to find out what supplies your child needs. (C) Keep these lists handy with you, as they can serve as inspiration when you are looking for the right supplies. [substeps] If you chose to go to a local school, get a list of school supplies for the children at the school. (D) [title] Check to see what the principal has to supply. [step] If your child's school doesn't have much in stock, their parents may have suggestions on what to include as a kit.
[EX A]:
A