'மாலை மாற்று' என்றால் என்ன?

Some puzzles do puzzle you indeed, and the one below is one of them:

Like each one of us, my friend Hannah loves her name. Looking down from her apartment located in the 12th floor, she loves to exclaim "Was it a car or a cat I saw?". The question is: What would you suppose her favorite town is?

(a) Boca Raton, Florida
(b) Saxet, Texas
(c) Reston, Virginia
(d) Potomac, Maryland