TASK DEFINITION: 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.
PROBLEM: Question: To get the fastest reaction, raise the temperature of the reactants 
 Option1: lower 
 Option2: higher or 
 Explanation: When the temperature of reactants is higher, the rate of the reaction is faster.

SOLUTION: higher or

PROBLEM: Question: Jan is cold, so she starts to jog in place. The faster Jan jogs, she will feel warmer 
 Option1: quicker 
 Option2: slower 
 Explanation: When particles move more quickly, temperature is higher and an object feels warmer.

SOLUTION: quicker

PROBLEM: Question: If Mary is building a rocket and she wants it to fly as high as possible, what should she do to the mass of the rocket? 
 Option1: increase it 
 Option2: decrease it 
 Explanation: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.

SOLUTION:
decrease it