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 cure swollen gums [title] Talk with your dentist. [step] Make an appointment with your dentist if you notice that your gums are bleeding or irritated throughout the day. You can also bring up this issue with your dentist when you see them every 6 months for a cleaning. <sep> (A) [substeps] You can also get a referral to a dietician who specializes in simply treating swollen gums at home. They may be able to diagnose swollen gums by looking at how your gums feel. (B) You can ask that your dentist discuss all of the possible treatment options with you. [substeps] Your dentist will likely order annual x-rays for you. (C) Dentist visits will help clear up any bleeding and ease your pain. [substeps] Some gums naturally bleed after eating. (D) You might end up visiting your dentist twice a year for repeated cleanings. [title] Avoid gum infections if you suffer from a periodontal disease.
B

[header] How to act during a fire drill [title] Stay calm. [step] Do not panic when you hear the fire alarm. Also, it's important to stay quiet so you can hear any instructions. <sep> (A) Also, do not get caught panicking. Staying calm will help you calm down as the fire clock ticks and alarms go off at regular intervals. (B) [title] Do not attempt to push the drill to divert the fire. [step] Do not attempt to push the drill at people or leave the master fuse unattended. (C) Turning to your cell phone or microphone can be deadly! [title] Stay warm. [step] Do not wait until the fire is out to stay warm! Your body temperature can drop, but it's better to stay near a heat source. (D) [substeps] In fact, it's important to be quiet and calm the whole time the fire drill is happening, not just when it starts. [title] Treat the alert as if it were a real fire.
D

[header] How to make " quick' n easy " nachos [title] Scatter chips onto a large microwave safe plate or platter. [step] If you are making nachos for a group, use the entire bag. If you prefer a smaller portion, pour as many chips as you would like (you can try half a bag or 1/4). <sep> (A) [substeps] Stack smaller chips aside for later and messier nachos. [title] Scrape any chips that you discarded with a wooden spoon into the center of the plate. (B) [substeps] If you are making more nachos than one plate can support, you can use two plates and microwave separate batches. [title] Scoop 1 cup of refried beans into a microwave safe bowl. (C) Move the chips around so they have room for expansion. [title] Sprinkle the chips and cheese evenly throughout the nachos. (D) [title] Place the tortilla chips into the microwave. [step] ( if using a microwave, the microwave does not need to be in use for this whole nachos.
B