Answer:
The correct answer is option A. Other character will fear it because they cannot understand what it wants.
Step-by-step explanation:
If a monster cannot communicate, the mere fact of being a monster would make people afraid of it.
There are many stories where we can see "friendly monsters" but if you think about it, it is because those monsters can talk or exchange their feelings with the human in some way.
If a monster appears, and it has no way of telling you what it wants, your instinct will be to be scared and run away from it.
Given this information we can say that the correct answer is option A.