Correct option is B
We can determine the seller's final position by tracking her movements step by step in a coordinate system where the starting point is .
Step 1: Analyze movements step-by-step
First Movement: Walks 7 km north.
New position: . Second Movement: Turns west and walks 6 km .
New position: . Third Movement: Turns south and walks 2 km .
New position: . Fourth Movement: Turns west and walks 3 km .
New position: . Fifth Movement: Turns left (which is south since she was walking west) and walks 5 km . New position: . Step 2: Determine final position The seller's final position is 9 km west of the starting point along the x -axis and at the same level vertically ( -coordinate ).