I found myself at a loss to understand my closest friend's words.

I found myself at a loss to understand my closest friend's words.
A. I found my closest friend's words easy to understand.
B. I found my closest friend's words quite incomprehensible.
C. I lost my heart and didn't understand my closest friends' words.
D. I understood my closest friend's words completely.
⇒ Lựa chọn đúng là B