On Sunday just gone , we were walking around Covent Garden , briefly forgetting that it was the Queen 's official birthday celebration that day . First a few choppers went by . Then definitely some Lynxs and Gazelles .
According to the above context, choose the best option to answer the following question.
Question: Why is such a military presence being shown in the air ?
Options:
A. They are there to protect royalty .
B. They are there to fight a war .
C. None of the above choices .
D. They are there to defend territory .


A