Answer:
c. Ambiguous
Step-by-step explanation:
Ambiguous means something that is unclear or open for interpretation. In the passage, the events are not entirely clear. The author is unsure of what is happening and why the children are there. This gives an ambiguous tone because the author has a feeling of uncertainty about the topic being discussed.
The author does not use any words with negative connotations. This shows that hostility and mocking cannot be correct because both of these tones would include being mean towards to topic.