Identify the correct statements regarding Mass flow hypothesis. (A)...

Long distance transport of substances within a plant cannot be by diffusion alone as it is a slow process. Thus, special long distance transport system (mass flow system) become necessary so as to move substances across long distance and at a much faster rate. Thus statement $(A)$ is correct. Mass flow is the movement of substances in bulk from one point to another as a result of pressure differences between the two points. Thus, statement $(B)$ is correct. It is a characteristic of mass flow that substances, whether in solution or in suspension, are swept along at the same pace. Thus, statement $(C)$ is incorrect. Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient. Thus, statement (D) is correct. Thus, option (2) is correct as it is mentioning all the correct statements.