Which option has the incorrect or inappropriate usage of 'spot'?
- AShe wanted to make a good impression but, at the last moment, she discovered a spot of ink on her collar.
- BThere was a scenic spot not very far from our cottage where we used to go for picnics.
- CSuch a spot on his career was difficult to ignore when deciding promotions.
- DHe was unsure if he could respond to the question asked; fortunately, his answer was spot on.