Which is the correct way to combine sentences 6 and 7? (6) the teacher didn't know what to do. (7) it was her first year of teaching and she wanted to leave it feeling proud of her achievements. a the teacher, not knowing what to do, and it was her first year of teaching, and she wanted to feel proud of her achievements. b not knowing what to do because it was her first year of teaching and wanting to feel proud of her achievements is what she wanted to do. c the teacher, not knowing what to do and being her first year of teaching, and wanting to leave feeling proud of her achievements. d the teacher didn't know what to do; it was her first year of teaching, and she wanted to leave it feeling proud of her achievements.

i think it is d. but i am not sure.