You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

[Q]: Question: Jeffrey decreases the number of carbon atoms to a natural gas hydrocarbon in a lab. The isomers 
 Option1: increase 
 Option2: decrease 
 Explanation: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
[A]: decrease


[Q]: Question: A hydrocarbon that halves its carbon atoms will cause an _____ in the amount of isomers. 
 Option1: decrease 
 Option2: increase 
 Explanation: As you increase the number of carbon atoms in a hydrocarbon, the number of isomers quickly increases.
[A]: decrease


[Q]: Question: Jeff lost some blood in a car crash and was given a transfusion in the hospital to replace the blood. Jeff's blood pressure will be higher 
 Option1: when he lost the blood 
 Option2: after he had blood replaced. 
 Explanation: As blood volume in the body increases, blood pressure increases.
[A]:
after he had blood replaced.