Task: Question Answering
Input (English): Question: Temperature is one of the important variables in the emission techniques, because: 
 Options:  <1> The energy emitted by the atoms varies exponentially with it. <2> The population of atoms in the excited state decreases when it increases. <3> The population of atoms in the excited state increases when it decreases. <4> By increasing the atoms evaporate and the analytical signal decreases. <5> When increasing it increases the power of the electromagnetic radiation coming from the hollow cathode lamp.
Output (English): 1