Final answer:
John's resultant displacement from the 232 km marker after traveling from the 146 km marker to the 167 km marker is 21 km.
Step-by-step explanation:
The student asked, "What is John's resultant displacement from the 232 km marker after traveling from the 146 km marker to the 167 km marker?" The resultant displacement can be found by subtracting the starting point from the ending point. Here, the calculation would be 167 km - 146 km, resulting in a displacement of 21 km.
So, the answer is (a) 21 km.