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: If John heats a gas in his bunsen burner, what would happen to the gas particles? 
 Option1: they would move faster 
 Option2: they would move slower 
 Explanation: If the gas is heated, the particles will move faster as they gain more energy.

A: they would move faster
****
Q: Question: The electrons with the _____ energy are nearest to the nucleus. 
 Option1: most 
 Option2: least 
 Explanation: Electrons at higher energy levels, which are farther from the nucleus, have more energy.

A: least
****
Q: Question: Jonathan is digging at a site, trying to uncover old rocks. In order to find the oldest rocks, Jonathan needs to dig 
 Option1: deeper 
 Option2: less deep 
 Explanation: Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger.

A:
deeper
****