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 know if your dental fillings need replacing [title] Watch for tooth sensitivity. [step] If you have fillings that need replacement, you'll likely feel it first. Paying attention to the physical symptoms of old or decaying fillings can let you know if it's time to have your dentist replace them. <sep> (A) One sign that your fillings may need replacing is if you have tooth sensitivity to temperature, sweets, or pressure. [substeps] Pay attention when you bite into any cold, hot, or sweet foods. (B) Teeth sensitivity occurs when gums become severely stained with white blood. These white discolorations are mainly due to gum disease, but most commonly introduce a white blood cell colony to the side of your mouth. (C) Once your doctor notices an increase in tooth sensitivity, he or she can return you to the dentist. [substeps] Are your teeth hurt or moist? Severe tooth pain, cramping, sensitivity, or tingling are all signs that they need replacement. (D) [substeps] Bad tooth sensitivity is usually not a problem until it gets worse and you start to feel pain. You may experience sensitivity at night and bad teeth at the same time.
A

[header] How to get a bikini body fast [title] Know that many body types look fantastic in a bikini. [step] It is too easy to be sucked into the trap that only slender , 80 lb women look good in a bikini. By eating right and exercising frequently you can earn a healthy body that looks good in a bikini and out. <sep> (A) [substeps] Get at least eight hours of sunlight every day. If you don't have access to windows and a pool, tanning beds or a sun porch can work wonders. (B) [substeps] Your waist shows the boat things and as a rule of thumb it can also look great in a bikini. You can make a t shape by slicing a slice of a citrus peel and dropping the peel into a shallow dish or bowl. (C) Have confidence in yourself and your body will look great. [title] Understand that there are 3 , 500 calories in a pound of fat. (D) Put that curvy up a notch and you will soon be tan. [title] Find the right type of swimsuit.
C

[header] How to overcome a fear of sex [title] Face your fear. [step] Determine what you are afraid of and challenge it. When it comes to being fearful of sex, you need to know what has caused you to be afraid. <sep> (A) Identifying specific fears will help you focus on finding a solution. [substeps] Sit down and make a list of the things you fear about sex. (B) Have you always been tempted to use sex to your advantage? Through both physical and spiritual use? This may be a fear of commitment, loss, depression, infidelity, or sex. Discuss your real and imaginary fears with people who will treat you the way you want them to treat you. (C) Consider the following questions you can try to figure out : [substeps] Why do you fear having sex? Is it genetic? There is often a chance someone around you may have different ideas about sex than you. Maybe you hate men but feel you like them less than you actually do, but really are afraid of sex? Don't let your fear of being sexually intimate forbid you from having sex. (D) [substeps] Most people fearful of sex are men and women. There is a reason men do not experience the variety of sexual urges that women do.

A