yesterday his mobile phone got lost
I would say that I am against the idea of using controlled fires to protect wild areas.
For one fires can very easily get out of hand, especially if the area is dry at the time that the fire is started. When and if the fire gets out of hand it would do way more harm than good to the wild life in the area.
Well a digression is a temporary departure from the main subject in speech or writing. So because the person writing the paragraph getting ill last year has nothing to do with this years cookie sale, I think you are correct, sentence 3 is an example of a digression. So D is the answer.
Answer:
that he probably wasnt or didnt think he was alone
Explanation: