So in developing a presentation outline, the first thing that we are going to do is to introduce what it is all about. This means that the main points come first. After the main points, follow the sub points. The sub points serve as the explanation of the main points. After the sub points are the illustrations and examples. These are already the specifics which support the sub points and the main points. Therefore, the answer is A.
Think of carving a sculpture. When carving you will start by chipping away at big chunks of clay, this is your main points. Then after the big chunks of clay are gone you will start to create the shape of your sculpture. You will chisel away at your clay with a more precise tool which are your sub-points. After the figure of your sculpture is defined you will start to create more details, this is your illustrations/examples.
Btw I've never sculpted anything but I generally know how to I guess. Also if that explanation wasn't enough for you, I just answer that question on a quiz and it said I was right so...
