I believe the answer is: What type of public transit does your family prefer to use?
To answer the question above, people just need to recall their memory on the type of public transit that their family used more often.
Questions such as "How does public transit benefit the environment?
" and "Which cities have the most efficient public transit system?" would need an indepth research while question such as "How many of your classmates use public transit?" would need direct counting.
George Bernard Shaw's play Pygmalion is centered on the idea that life is too realistic to believe in the fabrication of idealism.
She was having a difficult time
I think D is the opinion. The answer says, "as far as I could tell" meaning he isn't sure he is just guessing.