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". 

Q: [header] How to paint masonry walls [title] Remove any flaked or peeling paint from the masonry. [step] If the wall has already been painted, you need to remove any old paint that is loose, peeling, or flaking away. On an exterior wall, this is most efficiently done with a sandblaster. <sep> (A) New paint must be removed from the wall first, gently scraping around the edges with a rat-tail tail reciprocating scraper. This is most often done on exterior paint walls that are still meant to protect it from debris. (B) In areas where a sandblaster would be too messy and cumbersome, loose paint can be removed with a stiff wire brush and a paint scraper. [substeps] Failing to remove loose and peeling paint can result in the paint flakes mixing in with your fresh coat of paint and marring the finish. (C) [substeps] Make sure to turn off the water. Do not flush the wall down the drain. (D) If there is a paint-resistant paint strip still clinging to the wall, it may be painted to the wall as well, but not directly under it. [substeps] Using a sandblaster may be wise, but if the paint is not taking off, it may be better to start by sanding lightly.

A: B
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Q: A view is seen of the outside of an airport, then the wing of the flying plane. A man is on the plane wearing a mask. several people <sep> (A) are sleeping in the dark quarters. (B) fly by on a road inside the plane. (C) are shown flying the aircraft, while shooting at a large target at one point. (D) speak, then they all fly kites on the plane while people walk by.

A: A
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Q: [header] How to digitally sign pdf documents [title] Download pdf utility from messiah's " codes for us " blogspot. [title] Save the " jar " file somewhere in your computer. [step] ( no installation is necessary. <sep> (A) ) [title] Download some pdf utility we have in our own scriptwriteau.com. [step] It only includes small amounts of instructions, and you'll get a good idea of how to use it for when you sign it. (B) ) [title] Double click the " jar " file to open the software. [title] In the right hand panel, there is a button for signature manager. (C) ) [title] Export a pdf with unetforumc to firefox. [title] Visit wikipedia and download " pdf utility ". (D) ) [title] Access the system preferences folder, in your firewall directory. [title] Copy the pdf utility into any section of your firewall.

A:
B
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