Read the following context and choose the best option to answer the question.
Context: They can now only be rented for special occasions . Clearly our group constitutes a special occasion . We all hopped on - well in between taking pictures - and headed to Parliament Square . We got a nice view of the bell tower that houses Big Ben ( the bell ) as well as the Parliament buildings . We spent the remainder of the morning touring Westminster Abbey with 2 Blue Badge guides .
Question: Why are they in London ?
Options: 
A. They are there on a school trip .
B. None of the above choices .
C. They are there to rent a car .
D. They are there with their family .


A