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".

[Q]: [header] How to write a newspaper headline [title] Understand the key elements of a newspaper headline. [step] A good newspaper headline will be factually correct, connect to ordinary readers, attract attention using active words, and match the tone of the article. [substeps] Accuracy is very important when writing a newspaper headline, as you do not want to create an unintended meaning or confuse your reader. <sep> (A) It's critical that headlines match a published page or text. So do not simply copy and paste the journalist's name or a non-published article after a headline and e-mail the cover letter to the editor. (B) [title] Include a colon at the top of the page and then a colon after it. [step] The first colon will act as a prompt and the other colon will be used to write the rest of the article. (C) The headline should be at least three-quarters of the way down the entire body of the article. Rarely is a headline more important than the rest of the article. (D) Avoid exaggerating or embellishing the content in the article by using an overblown headline. Instead, aim to communicate clearly with your reader through a short, one to three word headline.
[A]: D

[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.
[A]: D

[Q]: [header] How to tell the difference between twins [title] Observe their facial features. [step] Twins often have different shaped eyes, jawlines, cheekbones, lips and other facial features, including moles or birthmarks on the opposite sides of their bodies that can help you tell them apart. You might also notice that one has a darker skin tone or complexion. <sep> (A) [title] Look closely at how their height differs. [step] You may discover that one twin is taller than the other, or tends to stand up a little straighter than his or her sibling. (B) [substeps] Twins may think that their noses are slightly too large or that they have more lips. They may also not have their noses closer than your own nose when in doubt. (C) Because twins are so closely related, the similarities often display between twins come from historical or cultural backgrounds. [substeps] Boys and girls typically have slightly different skin tones. (D) This can be a sign that your twins have different facial characteristics than you! It's best to get a blood test done so you can be certain. [substeps] Twins have fangs both above the lip and below their teeth.
[A]:
A