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: Fred has an isotope that decays quickly. What is likely true about it? 
 Option1: it can be used to date older specimens 
 Option2: it can't be used to date old specimens 
 Explanation: Because these isotopes decay more slowly, they can be used to date much older specimens.

SOLUTION: it can't be used to date old specimens

PROBLEM: Question: A stream going across a low plain will have to do _____ cutting. 
 Option1: much 
 Option2: little 
 Explanation: In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.

SOLUTION: little

PROBLEM: Question: Mike is trying to make two different things slide across the ground. One is block, the other is a chair. The thing that will be easiest to push has 
 Option1: more mass 
 Option2: less mass 
 Explanation: Its harder to overcome friction between heavier objects and the floor than it is between lighter objects and the floor.

SOLUTION:
less mass