Four students each make the following claim after measuring…

Four students each make the following claim after measuring a sample: Student A: “I have 1 mole of helium atoms.” Student B: “I have 1 mole of oxygen molecules (O₂).” Student C: “I have 1 mole of carbon atoms.” Student D: “We all have exactly the same number of particles.”                                                                                          Which statement is most accurate?