A) is wrong, draw a picture to prove so

C) This doesn't even make sense, did you mean area of triangle ABC = 4*Area(Triangle DEF)? If so, then note that the legs of DEF are half the size of the legs of ABC, the area of ABC is equal to 0.5bh, but now the base and height go down 50%, so the area of DEF is equal to 0.5^3 bh which is 25% the size of the larger triangle, so this statement is TRUE

If C is true and this is a single choice question, then C is your answer.