Answer:
It reveals the thoughts of all the characters, and it maintains a sense of objectivity.
Step-by-step explanation:
Omniscient means "to know everything that is going on," so it only makes sense to select these two. The others are wrong because the limited omniscient POV is in the third-person POV, not the first or second POVs. And if it is omniscient, the narrator can't only know the thoughts of one person.