OreoShake wrote:
Dont really get why C is wrong, to me it felt unidiomatic but no real grammer issues. 'to be an expatriate' acts as a noun and should be correct as well.
Any comment is appreciated.
If you recollect the use of "placeholder IT", then you would probably realize why C is awkward.
It is fashionable to be expatriate... correct ( The placeholder "it" replaces "to be expatriate").
The placeholder is used to eliminate the awkwardness in the following sentence:
To be an
...
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