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". 

[EX Q]: [header] How to bend rebar [title] Understand the structural issues possible with manually-bent rebar and know how to avoid them. [step] When you bend metal, you naturally weaken it. When done correctly, however, you can minimize damage and still get the shape you need to complete the project. <sep> (A) [substeps] Badly bent rebar acts as a buffer for the metal particles of the laser beam. The piece of rebar you are bending dissolves when squeezed into contact. (B) This effect is part of the re-bend method. The process is a little different than rebending a rubber band, but the difference is that you bend it in half by simply opening up a v on each end. (C) Because of this, it's important for you to know how to modify the shape you want the rebar to be. If you have a badly bent rebar, you'll likely create grooves in the rebar that introduce excess material. (D) Keep the following in mind as you work : [substeps] Always note the grade and size of the bar you're bending, checking against the equipment you're using to ensure it works. Check with your project engineer to ensure your bends meet the minimal internal bend diameter.
[EX A]: D

[EX Q]: [header] How to make donut holes with yeast [title] Prepare the dry ingredients. [step] Mix 4 cups flour , 1/4 cup sugar, and 1 tsp salt in a bowl. [title] Activate the yeast. <sep> (A) [step] The dough will rise and become fluffy once activated. [substeps] After mixing the wet ingredients with a fork, the dough will rise to roughly the normal texture. (B) [step] Pour 6 tbsp water into a different bowl and 1 1/4 tsp dry active yeast. Let it stand for about 5 minutes, or until the yeast starts bubbling. (C) [step] In a bowl, mix 1/2 teaspoon salt and 1/4 cup yeast. Stir these ingredients lightly in a bowl until you see white foam form. (D) [step] Add together 3 tbsp flour , 4 cups yeast, and 1 1/2 teaspoons table salt. Combine the dry ingredients first and stir in 3 tbsp water.
[EX A]: B

[EX Q]: [header] How to avoid hazardous cookware [title] Avoid non-stick cookware. [step] Non-stick cookware may be convenient, but it can be very dangerous. Non-stick cookware may release toxic fumes if it is overheated. <sep> (A) Choose non-stick cookware at work or in your home. You do not need to stock up with non-stick cookware for it to work. (B) It can crack or melt or cause burns if not adequately thoroughly cleaned and stored. All cookware should be cleaned with oven-safe non-stick cookware before you cook. (C) These fumes can be dangerous if you inhale them. Stay away from teflon pans. (D) It is strongly discouraged for children under the age of 10 to use non-stick cookware. Make sure that your children are not allergic to non-stick cookware; you can try one of the following : [substeps] Glass.
[EX A]:
C