fozzzy wrote:
What does "it" refer to in option D?
The construct
" it was fashionable to be an expatriate"
appears in every sentence. What does "it" refer to? Nothing in particular. Generally speaking when you see a pronoun, you should always check if it matches the subject it's replacing.
However in those types of sistuations - example: it is preferable to walk - it has no reference in the sentence.
Hope it's clear