Which of the Following Is/are True Concerning Formal Charge

Which of the following is/are true concerning formal charge?
1) The formal charge of each individual atom in a molecule or ion is an actual atomic charge that can be experimentally determined.
2) The formal charge of each individual atom is always the same for each possible resonance form.
3) The sum of the formal charges of each atom in a molecule or ion equal the overall charge of the molecule or ion.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1 and 3