I believe the answer would be <span>C. Opening a door for someone who is carrying things</span>
Answer:
D- A researcher has to be in the same physical location as a print source.
Explanation:
See attachment :)
Though he once treated Ivan as if he were almost his son, his life kind of went sour after his wife left and he grew less attached to Ivan, who was a sore spot in their marriage. These days, Mack drinks and his ethics are, well, questionable.