Doubt in a quiz

Course: M320
Chapter: 2
Topic: One to Zillions
Question:
Options:

  1. The relationship representations that embed documents are not recommended.
  2. We must take extra care when writing queries that retrieve data on the zillions side.
  3. It is a special case of the one-to-many relationship.

Answer:
All of these statements are true.

Doubt:
If we are referencing on the zillion’s side, when we retrieve from the data from zillions side, wouldn’t there be just one reference to the one’s side? which doesn’t need any handling?
If it would been the other way around, say, if we had referenced on the one’s side, when we retrieve data we have got a zillion of references, so that data would need to be handled.