Task: Question Answering
Input (English): Question: Linear sweep voltammetry is characterized by: 
 Options:  <1> To be a technique based on a stationary diffusion regime. <2> To be a voltammetric technique based on a pure diffusion regime. <3> Use a rotating electrode as working electrode. <4> Use a hanging drop electrode as the working electrode. <5> Have an electrode preconcentration stage.
Output (English): 2