These are the easiest and my favorite type of pattern folding. Make sure the final product has all the unique pieces in it, then check for connectivity.
A--the top 2 L and P shapes are not connected by their skinny sides.
D--has the same connectivity problem as A, with the L and P shapes.
At this point it is hard to distinguish between B and C, so I would look at B because it shows us the triangle portion. This is where I get stumped, and would simply pick B because I can see all the different shapes are present.
Whats the answer? I pick B