I’ll claim #3:
非常に申し上げにくい事ですが
Comments
(I recognize ‘fei chang’ in Chinese, the first two characters. It means extremely).
非常に:very, extremely;
申し上げ:ichidan v., to say, to tell, to express;
Note: the first に of the sentence is an adverbial while the second に is the indirect object marker;
くい事:according to Weblio, it means ‘‘a delicate matter’’:
「くい事」を解説文の中に含む見出し語
Weblio英和辞典・和英辞典の中で、「くい事」を解説文の中に含んでいる見出し語のリストです。
It is an extremely delicate matter to say.