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.
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Question: Question: Smaller dogs have a slower growth rate than big dogs so that means they get: 
 Option1: Smaller 
 Option2: Larger 
 Explanation: In exponential growth as the population size increases, the growth rate also increases.

Answer: Smaller


Question: Question: When we dig up rocks the deeper we get the rocks get 
 Option1: older 
 Option2: younger 
 Explanation: Older rocks are at the bottom and younger rocks are at the top.

Answer: older


Question: Question: Which sort of atom would require less energy to split in a fission reaction, 
 Option1: Helium, with its two protons 
 Option2: Plutonium, with its 94 protons? 
 Explanation: As more protons are added to the nucleus, the electromagnetic force of repulsion between them gets stronger, while the strong nuclear force of attraction between them gets weaker.

Answer:
Plutonium, with its 94 protons?