A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
A group of students is taking a hike along a stream channel. One student picks up a rock from the stream and notices that the rock is very smooth and round. Which type of weathering most likely shaped the rock?

### Choices:
A. abrasion
B. exfoliation
C. fracturing
D. oxidation

### Answer:
