The employer letter, because it frames everything else. Citizenship proof, the licence, the certification and translations are then checked against what that letter claims.
Build the package around the letter, then support each claim in it
Present the employer letter on top, because it tells the officer which profession is claimed, who the employer is and what the nurse will do. Behind it, in the order the letter raises them, place the Canadian passport, the Quebec licence with a certified English translation, the nursing diploma, the health-care worker certification, and the state licence or the board's confirmation of issuance. Each item should answer a sentence in the letter rather than sit in a general pile.
If the placement is through an agency, add the agency's contract with the hospital so the control relationship is visible. Keep copies of everything the officer retains, and note the admission period stamped or recorded, because the renewal calendar starts from that date rather than from the start date the hospital chose.