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 perform an autopsy on a human being [title] Understand what an autopsy is. [step] An autopsy is a detailed examination (and dissection) of a human body after death. It is used to determine the likely time and cause of death, as well as to evaluate the presence of disease and/or injuries. <sep> (A) An autopsy is often performed during the day after a death, or at night. Depending on your body type, an autopsy can last longer or shorter if done with the right equipment. (B) The autopsy is often conducted as a procedure administered in an office, rather than a surgical procedure, but it is treated in multiple ways. [substeps] For a crime scene autopsy, the job is to put the human body's dna on a piece of paper and then render it to a laboratory for analysis. (C) [substeps] An autopsy is conducted by a pathologist, which is a doctor with specialty level training in how to do the procedure and how to effectively analyze the tissues and body fluids. If the person's death is being investigated forensically, an autopsy may be legally mandated. (D) A typical autopsy takes place approximately 50 minutes after the death of the patient. The procedure consists of the following components : [substeps] Removing the deceased's organs from the body.
C

A man sits down by the sidewalk playing a guitar. A black man approaches to watch the guitarist perform. a woman <sep> (A) approaches to sing with them and they begin to have a conversation. (B) stands by recording the performer. (C) comes holding a guitar made out of materials. (D) at various functions watches on as the guitarist plays.
B

[header] How to keep your children and teens safe online [title] Place computers with internet access in a central location in the home. [step] When computers are in a central location, they can be easily monitored, but if placed in private places such as bedrooms, children can quickly close inappropriate websites when they hear their parents coming. [title] Get rid of the webcam. <sep> (A) [step] It might seem like a last resort because it will easily block access to your online box. It might also cause your child to constantly check out your internet identity and send unwanted notifications. (B) [step] Make sure all the webcam knobs are securely locked. [title] Disable video and picture uploads. (C) [step] Webcams can be a great way to communicate with your friends and family, but leaving a teen unsupervised with a webcam can lead to your child's strip show debut. [title] Decide what online activities are age appropriate. (D) [step] If a webcam is easily accessed in your home, don't allow your children and teens to use it. Inappropriate viewing may result in your children being caught.
C