Which of the following statements is TRUE for degree of disturbance of collected soil sample?

1. Thinner the sampler wall, lower the degree of disturbance of collected soil sample
2. Thicker the sampler wall, lower the degree of disturbance of collected soil sample
3. Thickness of the sampler wall and the degree of disturbance of collected soil sample are unrelated
4. The degree of disturbance of collected soil sample is proportional to the inner diameter of the sampling tube