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: If Mona is bouncing radar waves off a test car when training to be a policewoman and she notices the frequency of the waves returning to her radar gun is lower then it was before, what is happening to the car she is pointing the gun at? 
 Option1: decreasing in speed 
 Option2: increasing in speed 
 Explanation: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.

SOLUTION: decreasing in speed

PROBLEM: Question: John was a doctor in a cancer ward and knew that early detection was key. The cancer being detected quickly makes the cancer treatment 
 Option1: Easier 
 Option2: Harder 
 Explanation: The sooner cancer is detected the easier it is to treat.

SOLUTION: Easier

PROBLEM: Question: A moving ball that is only heavily resisted by fluid friction is likely to be quite 
 Option1: small 
 Option2: large 
 Explanation: The faster or larger a moving object is, the greater is the fluid friction resisting its motion.

SOLUTION:
large