Given the task definition and input, reply with output. 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).

Paragraph: The smaller a population is, the more allele frequencies may drift.
Question: Would you expect to see greater allele shift in a population of roses grown in a greenhouse if the greenhouse had
Choices: A)20 rose plants
B)2,000 rose plants?
20 rose plants