Be igniting the doubt for the person talking to them or telling them the truth
The answer is c. Theo, is there a bug on my back?
This is because for the other three sentences, the commas do not agree with the places they were put in. If you read the sentences aloud, you can hear that it sounds awkward.
I think recycling should be mandatory. The reason why I chose this is because of pollution. Pollution exists because people throw plastic and trash everywhere. If everybody in the world recycles then pollution would definitely decrease.