Answer:B. The author includes the sound of the beeps from a radio signal, indicating the scientists
are close to a bear.
Explanation:
A.) A thesis does not have a stated opinion. It just needs to have information of what it is you will be talking about.
The best way to do so is by stating your claim, and use evidence to support it. If there is no evidence to support your claim, it is simply just an opinion and people will have no reason to think you are right.
Hope this helped, have a good day :)