Detailed Instructions: You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
Q: Paragraph: Smaller tributary glaciers, like tributary streams, flow into the main glacier in their own shallower U-shaped valleys.
 Question: Reid notices that tributary glaciers make U-shaped valleys when flowing. A small valley was likely caused by a _____ tributary glacier. 
 Choices: A)small 
B)large
A:
small