Answer:
Option B.
Explanation:
Obvious. Lets explain:
Option A: It's pretty ease to do. You just need 2 triangles to make a parallelogram, and that's that.
Option B: How can you make a rectangle from triangles-???
Option C: You might think I am wrong, but I am right. Get 6 triangles, then plato, you have a whole hexagon!
Option D: You probably already know this...but you just need three triangles.
It's correct on every school thing.
Option B is your answer!