A Solution Contains 30 Ppm of Some Heavy Metal and the Density

Multiple Choice

A solution contains 30 ppm of some heavy metal and the density of the solution is This means that ________.

A) 100 g of the solution contains 30 g of heavy metal
B) 100 g of the solution contains 30 mg of heavy metal
C) the solution is 30% by mass of heavy metal
D) there are 30 mg of the heavy metal in 1.0 L of this solution
E) the molarity of the solution is 30 M