Please choose the correct answer to the question: Paper chromatography is a process used to separate mixtures of substances into their components. The components are carried by a mobile phase through a stationary phase made of absorbent paper. An investigation analyzed a sample of black ink to determine its components.Which property allows the components to separate?

Answer1: the solubility of the components in the mobile phase Answer2: the evaporation rate of the components at a certain temperature Answer3: the magnetic property of the components Answer4: the thickness of the paper used as the stationary phase

Answer format: answer1/answer2/answer3/answer4