A hiker walks along a mountain trail and passes through checkpoints A, B, C, and D.
The table below shows the altitude of each checkpoint above sea level.
| Checkpoint | Distance along trail (km) | Altitude (m) |
|---|---|---|
| A | 0 | 50 |
| B | 3 | 250 |
| C | 6 | 100 |
| D | 8 | 350 |
The greatest overall change in gravitational potential energy for the hiker is between which two checkpoints on the journey?
A and B
B and C
A and C
C and D