<em><u>An alliteration the occurrence of the same letter or sound at the beginning of adjacent or closely connected words.</u></em>
I think the answer is B.
Hope this helped.
Unfortunately, you missed to include in the problem above in which we can base our answer from. However, if the short event presented is to be concluded then probably Bertie's him for a while and decide against it knowing that Bertie might have flown somewhere.