Your answer would be C.
Platinum is consider one of the 12 most common native elements.
Percent composition of a molecule is found through the molecular formula (Mass of each element found in a single mole of the molecule ÷ total molar mass of the molecule). This tells you how much of a specific element makes up the molecule.
Also be aware that 2 molecules can have the same % composition but different formulas.
True would be your answer
Answer: operating machines they are easy to handle