Answer:
Someone may have seen him act suspicious. Causing for that to spread on the train so someone finally does something to alert people.
Explanation:
This was my best try-
Since you missed the given options, I will just provide the answer directly.
When a sentence is in the active voice, this means that the subject becomes the direct doer of the action. So, for the sentence to become active, it should be stated like this: They sung the newly composed songs. Hope this helps.
I would say “Mocking” due to the use of rhetorical questions and almost sarcastic remarks