A coordinating conjunction joins words, phrases or clauses having similar grammatical structure. A coordinating conjunction is also called a coordinator, which are 'but, and, or, so, nor, yet, for'.
Answer:
have you ever thought about changing your job?
I believe "was a bicycle" is correct.
To find quotes and analysing them and what does this suggest.
Yes, you are correct. Though, they all make sense and mean the same thing, but B is the best choice.