Which of the Following Statements Are True? I

Multiple Choice

Which of the following statements are true? I.Models are always wrong unless they are proved by a theory.
II) Elements,such as lead,are made of tiny particles that mostly consist of open space.
III) The air you breathe is an example of a heterogeneous mixture.
IV) Because NH₃ always contains the same relative numbers of atoms,it will always contain 4.6 g of nitrogen for every 1.0 g of hydrogen.

A) II only
B) II,IV
C) I,II,IV
D) I,III
E) All of the above statements are true.