PLEASE HELP! WILL MARK BRAINLIEST IF YOU'RE CORRECT! IF NOT, NO BRAINLIEST.

Answer:
B) Triangular Pyramid
Step-by-step explanation:
The solid formed by this net is a Tetrahedron or Triangular Pyramid. It most definitely is not a cone or triangle. It is not a Triangular Prism because Triangular Prisms have square or rectangular bases. Triangular Pyramids have triangle bases.
Hope it helps!