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 unlock tracfone mobile phones [title] Call tracfone. [step] Contact customer service at 1-800-867-7183 between 8:00am and 11:45pm, eastern time (et), 7 days a week. [substeps] If you did not buy your phone through tracfone, it is likely unlocked already, and no code is needed. <sep> (A) When you call, ask how long it should be on your phone or get a confirmation email for garfield. [title] Run an internet search for " tracfone mobile phones. (B) Look for a white box containing the code " 192.168.0.1. " if you do not see the code on the box, then replace it with the united states exit code (). (C) [title] Request an unlock code for your phone. [step] The representative will verify that your phone and account meet all the necessary conditions to be unlocked. (D) If you receive a voicemail notifying you that a call was unsuccessful, call customer service at 1-800-627-4590. [title] Place a text message (optional) on each call.
C

[header] How to make homemade hormone rooting powder or tonic [title] Use cinnamon. [step] Cinnamon prevents the growth of fungus. While it acts less as a rooting hormone, the fact that it curbs the fungal growth means that the plants have a great chance to grow without needing any additional help. <sep> (A) [substeps] Consider adding cinnamon powder to your herbal tonic each day by mixing small cinnamon cubes with water and using them for a week. [title] Try using flakes of dried marigolds. (B) [title] Try a silicon tablet or cacao tablet. [step] They can last up to a week, but commercially available forms are fast-acting. (C) [title] Dip or roll the cutting in ground cinnamon. [substeps] If dipping, tip some cinnamon into a cup and simply dip the cut stem end into the cinnamon. (D) Make sure that you use cinnamon in conjunction with regular root growth products, as cinnamon provides an excellent additive that can help regulate the risk of fungal infections. [substeps] Make sure that you use cinnamon on plants that are not affected by herbaceous or fungal infections.
C

[header] How to improve at indoor rock climbing [title] Warm up before you climb. [step] Taking time to warm up and stretch your muscles before you start a climb can help to prevent injuries. Warming up and stretching may also help to improve your performance, so it is important to start every climb with a few minutes of cardiovascular exercise and some good stretching. <sep> (A) [substeps] Try walking briskly or jogging back and forth in the gym for a few minutes to get your blood flowing. Stretch your arms, shoulders, core, and legs before you start your climb. (B) Good stretches include : [substeps] Arm circles lateral planks leg lifts (triangular planks) planks balance support beam (vertical planks) planks shoulder to chest stretch [title] Observe yourself climbing. [step] Take some time and look at yourself all the time. (C) If you get an injury but are able to handle it yourself, stretch for 15 minutes at a time, preferably before you're ready to hit the stairs. If you have a physical or mental condition problem, doing light workouts during this time can significantly improve your performance. (D) [substeps] Going for a jog isn't the same as doing a slow, light jog. Training your legs can help rebuild muscles such as your abs and biceps.

A