Among the following the statement that vary inverse variation is

Option (A): The cost of articles increased or decreased number of articles purchased increased or decreased respectively then they are in direct variation

Option (B): To construct a wall the number of men is increased the time taken to finish the work is decreased so inverse variation.

Option (C): At constant temperature pressure increased volume will be decreased. So inverse variation

Option (D): Area of the triangle is not fixed the base and height are not in inverse variation