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: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
 Question: A hydrocarbon that halves its carbon atoms will cause an _____ in the amount of isomers. 
 Choices: A)decrease 
B)increase
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
decrease