https://drive.google.com/file/d/1_nDv26urQIRVyr7sFe8M4O0yGmTZ2L4y/view?usp=drivesdk
The answer is B
The area of the triangle is 1/2 x B x H
B stands for base and H stands for Height
But in that diagram it doesn't show what the height is. This formula comes in handy which we can easily find the solution.
B is correct because it follows the area of the triangle.